Collection: Bearings - Single Row Ball

Bearings -> Single Row Ball
ID (d) O.D. (D) Width (B) Inner Ring Width (Bn) Flange Diameter (DF) Flange Width (BF) Indicative
Image
Single Row Ball Bearings - 4x9x2.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
0.600
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684-MC3-AF12 (Each)
200 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $3.41 AUD
Regular price $8.13 AUD Sale price $3.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 200 available can be backordered.
ID (d) O.D. (D) Width (B) Inner Ring Width (Bn) Indicative
Image
Single Row Ball Bearings - 4x9x2.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 0.600    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684-MC3-AF12 (Each)
200 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $3.41 AUD
Regular price $8.13 AUD Sale price $3.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

200 Available Now. Backorder if more than 200.
Single Row Ball Bearings - 4x9x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x9x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684D-ZZS-ECO (Each)
92 Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $3.86 AUD
Regular price Sale price $3.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 92 available can be backordered.
Single Row Ball Bearings - 4x9x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x9x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684D-ZZS-ECO (Each)
92 Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $3.86 AUD
Regular price Sale price $3.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

92 Available Now. Backorder if more than 92.
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Non ISO Width
Part Number: S684B-ZZ-MC3 (Each)
97 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $5.14 AUD
Regular price Sale price $5.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 97 available can be backordered.
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Non ISO Width
Part Number: S684B-ZZ-MC3 (Each)
97 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $5.14 AUD
Regular price Sale price $5.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

97 Available Now. Backorder if more than 97.
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Non ISO Width
Part Number: 684B-ZZ-MC3 (Each)
258 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $5.68 AUD
Regular price Sale price $5.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 258 available can be backordered.
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Non ISO Width
Part Number: 684B-ZZ-MC3 (Each)
258 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $5.68 AUD
Regular price Sale price $5.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

258 Available Now. Backorder if more than 258.
Single Row Ball Bearings - 4x9x3.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
0.600
Single Row Ball Bearings - 4x9x3.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684B-ZZ-MC3 (Each)
73 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $8.59 AUD
Regular price Sale price $8.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 73 available can be backordered.
Single Row Ball Bearings - 4x9x3.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 0.600    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684B-ZZ-MC3 (Each)
73 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $8.59 AUD
Regular price Sale price $8.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

73 Available Now. Backorder if more than 73.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZ-MC3-JP6 (Each)
12 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $5.50 AUD
Regular price Sale price $5.50 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 12 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZ-MC3-JP6 (Each)
12 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $5.50 AUD
Regular price Sale price $5.50 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

12 Available Now. Backorder if more than 12.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZS-ECO (Each)
95 Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $4.05 AUD
Regular price Sale price $4.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 95 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZS-ECO (Each)
95 Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $4.05 AUD
Regular price Sale price $4.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

95 Available Now. Backorder if more than 95.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZ-MC3 (Each)
194 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $4.32 AUD
Regular price Sale price $4.32 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 194 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZ-MC3 (Each)
194 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $4.32 AUD
Regular price Sale price $4.32 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

194 Available Now. Backorder if more than 194.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684A-ZZ-MC3 (PK-2)
150 units (300 pcs) Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $6.68 AUD
Regular price Sale price $6.68 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 150 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684A-ZZ-MC3 (PK-2)
150 units (300 pcs) Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $6.68 AUD
Regular price Sale price $6.68 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

150 units (300 pcs) Available Now. Backorder if more than 150.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last.
Part Number: 684A-ZZS-ECO (PK-5)
4 units (20 pcs) Available Now | Item Discontinued - Up to 4 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $3.49 AUD
Regular price $5.89 AUD Sale price $3.49 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

4 units (20 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last.
Part Number: 684A-ZZS-ECO (PK-5)
4 units (20 pcs) Available Now | Item Discontinued - Up to 4 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $3.49 AUD
Regular price $5.89 AUD Sale price $3.49 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

4 units (20 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684A-2RS-MC3 (Each)
173 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $6.23 AUD
Regular price Sale price $6.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 173 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684A-2RS-MC3 (Each)
173 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $6.23 AUD
Regular price Sale price $6.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

173 Available Now. Backorder if more than 173.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684A-2RB-ECO (Each)
750 Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $1.95 AUD
Regular price Sale price $1.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 750 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684A-2RB-ECO (Each)
750 Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $1.95 AUD
Regular price Sale price $1.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

750 Available Now. Backorder if more than 750.
Single Row Ball Bearings - 4x9x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
1.000
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684A-ZZ-MC3 (PK-100)
Out of Stock | Backorder Now | Orders can be expected around Sat, Mar 28, 2026
Regular price $465.68 AUD
Regular price $1,046.52 AUD Sale price $465.68 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 1.000    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684A-ZZ-MC3 (PK-100)
Out of Stock | Backorder Now | Orders can be expected around Sat, Mar 28, 2026
Regular price $465.68 AUD
Regular price $1,046.52 AUD Sale price $465.68 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
1.000
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684A-ZZ-ECO (Each)
10 Available Now | Further orders can be expected around Tue, Mar 31, 2026
Regular price $3.59 AUD
Regular price $8.56 AUD Sale price $3.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 10 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 1.000    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684A-ZZ-ECO (Each)
10 Available Now | Further orders can be expected around Tue, Mar 31, 2026
Regular price $3.59 AUD
Regular price $8.56 AUD Sale price $3.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

10 Available Now. Backorder if more than 10.
Single Row Ball Bearings - 4x10x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last. Non ISO Width
Part Number: MR104-2RB-ECO (Each)
179 Available Now | Item Discontinued - Up to 179 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $4.00 AUD
Regular price $7.60 AUD Sale price $4.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

179 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x10x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last. Non ISO Width
Part Number: MR104-2RB-ECO (Each)
179 Available Now | Item Discontinued - Up to 179 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $4.00 AUD
Regular price $7.60 AUD Sale price $4.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

179 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x10x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Non ISO Width
Part Number: MR104-ZZS-ECO (Each)
576 Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $2.59 AUD
Regular price Sale price $2.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 576 available can be backordered.
Single Row Ball Bearings - 4x10x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Non ISO Width
Part Number: MR104-ZZS-ECO (Each)
576 Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $2.59 AUD
Regular price Sale price $2.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

576 Available Now. Backorder if more than 576.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: MR104A-2RS-ECO (PK-2)
18 units (36 pcs) Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $1.23 AUD
Regular price $2.09 AUD Sale price $1.23 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 18 available can be backordered.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: MR104A-2RS-ECO (PK-2)
18 units (36 pcs) Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $1.23 AUD
Regular price $2.09 AUD Sale price $1.23 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

18 units (36 pcs) Available Now. Backorder if more than 18.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last. Deleted Item. Available while stocks last.
Part Number: MR104A-2RB-ECO (PK-10)
18 units (180 pcs) Available Now | Item Discontinued - Up to 18 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $20.00 AUD
Regular price $38.00 AUD Sale price $20.00 AUD
Priced, Stocked and Sold Per 10 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

18 units (180 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last. Deleted Item. Available while stocks last.
Part Number: MR104A-2RB-ECO (PK-10)
18 units (180 pcs) Available Now | Item Discontinued - Up to 18 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $20.00 AUD
Regular price $38.00 AUD Sale price $20.00 AUD
Priced, Stocked and Sold Per 10 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

18 units (180 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: MR104A-ZZ-ECO (PK-5)
31 units (155 pcs) Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $5.77 AUD
Regular price Sale price $5.77 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 31 available can be backordered.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
O.D. (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: MR104A-ZZ-ECO (PK-5)
31 units (155 pcs) Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $5.77 AUD
Regular price Sale price $5.77 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

31 units (155 pcs) Available Now. Backorder if more than 31.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: MR104A-ZZ-MC3 (Each)
77 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $4.14 AUD
Regular price Sale price $4.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 77 available can be backordered.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: MR104A-ZZ-MC3 (Each)
77 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $4.14 AUD
Regular price Sale price $4.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

77 Available Now. Backorder if more than 77.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: SMR104A-ZZ-MC3-AF12 (Each)
67 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $6.41 AUD
Regular price Sale price $6.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 67 available can be backordered.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: SMR104A-ZZ-MC3-AF12 (Each)
67 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $6.41 AUD
Regular price Sale price $6.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

67 Available Now. Backorder if more than 67.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: SMR104A-ZZ-MC3 (Each)
410 Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $6.68 AUD
Regular price Sale price $6.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 410 available can be backordered.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: SMR104A-ZZ-MC3 (Each)
410 Available Now | Further orders can be expected around Sun, Mar 22, 2026
Regular price $6.68 AUD
Regular price Sale price $6.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

410 Available Now. Backorder if more than 410.
Single Row Ball Bearings - 4x10x4 mm Flanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Flange Diameter (DF)
11.600
Flange Width (BF)
0.800
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: FMR104A-ZZ-MC3 (Each)
79 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $6.68 AUD
Regular price Sale price $6.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 79 available can be backordered.
Single Row Ball Bearings - 4x10x4 mm Flanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Flange Diameter (DF): 11.600    Flange Width (BF): 0.800    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: FMR104A-ZZ-MC3 (Each)
79 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $6.68 AUD
Regular price Sale price $6.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

79 Available Now. Backorder if more than 79.
Single Row Ball Bearings - 4x10x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Flange Diameter (DF)
11.600
Flange Width (BF)
0.800
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SFMR104A-ZZ-MC3 (Each)
129 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $7.41 AUD
Regular price Sale price $7.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 129 available can be backordered.
Single Row Ball Bearings - 4x10x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 11.600    Flange Width (BF): 0.800    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SFMR104A-ZZ-MC3 (Each)
129 Available Now | Further orders can be expected around Sat, Mar 28, 2026
Regular price $7.41 AUD
Regular price Sale price $7.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

129 Available Now. Backorder if more than 129.