Inserts - Expansion - Press In - Brass - Standard

Inserts -> Expansion -> Press In -> Brass -> Standard

There are 11 products in the sub-categories of Inserts - Expansion - Press In - Brass - Standard. Browse the Inserts - Expansion - Press In - Brass - Standard products table.

Category Details

A selection of Standard Brass Press In Expansion Inserts. Use for cored or drilled holes in plastics. Designed to replace molded in inserts and threads in plastic casings. Also known as threaded inserts.

  • Used to create a reusable threaded hole in a material by expanding once it is in place.
  • Installed by being pressed into a pre-drilled hole, and a subsequent tightening of a screw or bolt causes it to expand and grip the material's interior, providing a strong, stable connection.
  • Common types are for wood, plastic, and masonry, with different designs tailored to the material's properties.
  • Material : Brass.
  • Easiest inserts to install - simply push into a pre-moulded hole.
  • Used with plastics or other materials. Material must be strong enough to withstand the expansion of the insert.
  • The insertion of the screw locks the external knurls into the wall of the hole.
  • Provides excellent thread durability. Not as strong as wind-in inserts.

Small Parts & Bearings

Additional resources:


A more comprehensive listing may be found in the Inserts - Expansion - Press In - Brass - Standard category on the MBA Minibearings main store.
Internal Thread Rec. Hole Diameter Length (L) Recommended Hole Diameter (A) Knurled OD (B) Indicative
Image
Expansion Inserts - 0-80 UNF - 1.52mm - 2.36x3.18 mm Press In - Brass Insert
Internal Thread
0-80 UNF (1.52mm)

Rec. Hole Diameter
2.36
mm
+ 0.000 / - 0.254
(Equiv. 0.093 in.)
Length (L)
3.18
mm
+/- 0.25
(Equiv. 0.125 in.)
Knurled OD (B)
2.39
mm
+/- 0.102
Expansion Inserts - 0-80 UNF - 1.52mm - 2.36x3.18 mm Press In - Brass Insert
Material: Brass   
Part Number: IN-EP-015F-032-B (PK-5)
24 units (120 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$7.86 AUD
$7.86 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 24 available can be backordered.
Internal Thread Rec. Hole Diameter Length (L) Recommended Hole Diameter (A) Indicative
Image
Expansion Inserts - 0-80 UNF - 1.52mm - 2.36x3.18 mm Press In - Brass Insert
Internal Thread
0-80 UNF (1.52mm)

Rec. Hole Diameter
2.36
mm
+ 0.000 / - 0.254
(Equiv. 0.093 in.)
Length (L)
3.18
mm
+/- 0.25
(Equiv. 0.125 in.)
Expansion Inserts - 0-80 UNF - 1.52mm - 2.36x3.18 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 2.39 mm +/- 0.102   
Part Number: IN-EP-015F-032-B (PK-5)
24 units (120 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$7.86 AUD
$7.86 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

24 units (120 pcs) Available Now. Backorder if more than 24.
Expansion Inserts - M1.6 - 1.6x0.35mm - 3x4 mm Press In - Brass Insert
Internal Thread
M1.6 (1.6x0.35mm)

Rec. Hole Diameter
3.00
mm

(Equiv. 0.118 in.)
Length (L)
4.00
mm

(Equiv. 0.157 in.)
Knurled OD (B)
3.30
mm
Expansion Inserts - M1.6 - 1.6x0.35mm - 3x4 mm Press In - Brass Insert
Material: Brass   
Part Number: IN-EP-016M-040-B (PK-5)
14 units (70 pcs) Available Now | Further orders can be expected around Sun, Feb 01, 2026
$5.95 AUD
$5.95 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 14 available can be backordered.
Expansion Inserts - M1.6 - 1.6x0.35mm - 3x4 mm Press In - Brass Insert
Internal Thread
M1.6 (1.6x0.35mm)

Rec. Hole Diameter
3.00
mm

(Equiv. 0.118 in.)
Length (L)
4.00
mm

(Equiv. 0.157 in.)
Expansion Inserts - M1.6 - 1.6x0.35mm - 3x4 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 3.30 mm   
Part Number: IN-EP-016M-040-B (PK-5)
14 units (70 pcs) Available Now | Further orders can be expected around Sun, Feb 01, 2026
$5.95 AUD
$5.95 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

14 units (70 pcs) Available Now. Backorder if more than 14.
Expansion Inserts - 4-40 UNC - 2.85mm - 3.96x4.78 mm Press In - Brass Insert
Internal Thread
4-40 UNC (2.85mm)

Rec. Hole Diameter
3.96
mm
+ 0.000 / - 0.254
(Equiv. 0.156 in.)
Length (L)
4.78
mm
+/- 0.25
(Equiv. 0.188 in.)
Knurled OD (B)
3.97
mm
+/- 0.102
Expansion Inserts - 4-40 UNC - 2.85mm - 3.96x4.78 mm Press In - Brass Insert
Material: Brass   
Part Number: IN-EP-029C-048-B (Each)
86 Available Now | Further orders can be expected around Sun, Jan 18, 2026
$3.59 AUD
$6.02 AUD $3.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 86 available can be backordered.
Expansion Inserts - 4-40 UNC - 2.85mm - 3.96x4.78 mm Press In - Brass Insert
Internal Thread
4-40 UNC (2.85mm)

Rec. Hole Diameter
3.96
mm
+ 0.000 / - 0.254
(Equiv. 0.156 in.)
Length (L)
4.78
mm
+/- 0.25
(Equiv. 0.188 in.)
Expansion Inserts - 4-40 UNC - 2.85mm - 3.96x4.78 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 3.97 mm +/- 0.102   
Part Number: IN-EP-029C-048-B (Each)
86 Available Now | Further orders can be expected around Sun, Jan 18, 2026
$3.59 AUD
$6.02 AUD $3.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

86 Available Now. Backorder if more than 86.
Expansion Inserts - M3 - 3x0.5mm - 3.96x4.78 mm Press In - Brass Insert
Internal Thread
M3 (3x0.5mm)

Rec. Hole Diameter
3.96
mm
+ 0.000 / - 0.254
(Equiv. 0.156 in.)
Length (L)
4.78
mm
+/- 0.25
(Equiv. 0.188 in.)
Knurled OD (B)
3.97
mm
Expansion Inserts - M3 - 3x0.5mm - 3.96x4.78 mm Press In - Brass Insert
Material: Brass   
Part Number: IN-EP-030M-L-048-B (PK-5)
3 units (15 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$9.32 AUD
$9.32 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 3 available can be backordered.
Expansion Inserts - M3 - 3x0.5mm - 3.96x4.78 mm Press In - Brass Insert
Internal Thread
M3 (3x0.5mm)

Rec. Hole Diameter
3.96
mm
+ 0.000 / - 0.254
(Equiv. 0.156 in.)
Length (L)
4.78
mm
+/- 0.25
(Equiv. 0.188 in.)
Expansion Inserts - M3 - 3x0.5mm - 3.96x4.78 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 3.97 mm   
Part Number: IN-EP-030M-L-048-B (PK-5)
3 units (15 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$9.32 AUD
$9.32 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

3 units (15 pcs) Available Now. Backorder if more than 3.
Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Brass Insert
Internal Thread
6-32 UNC (3.5mm)

Rec. Hole Diameter
4.75
mm
+ 0.000 / - 0.254
(Equiv. 0.187 in.)
Length (L)
6.35
mm
+/- 0.25
(Equiv. 0.25 in.)
Knurled OD (B)
4.77
mm
+/- 0.102
Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Brass Insert
Material: Brass   
Part Number: IN-EP-035C-060-B (PK-5)
Out of Stock | Backorder Now | Orders can be expected around Sun, Jan 18, 2026
$6.23 AUD
$6.23 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Brass Insert
Internal Thread
6-32 UNC (3.5mm)

Rec. Hole Diameter
4.75
mm
+ 0.000 / - 0.254
(Equiv. 0.187 in.)
Length (L)
6.35
mm
+/- 0.25
(Equiv. 0.25 in.)
Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 4.77 mm +/- 0.102   
Part Number: IN-EP-035C-060-B (PK-5)
Out of Stock | Backorder Now | Orders can be expected around Sun, Jan 18, 2026
$6.23 AUD
$6.23 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Expansion Inserts - 10-24 UNC - 4.76mm - 6.34x9.5 mm Press In - Brass Insert
Internal Thread
10-24 UNC (4.76mm)

Rec. Hole Diameter
6.34
mm
+ 0.000 / - 0.254
(Equiv. 0.25 in.)
Length (L)
9.50
mm
+/- 0.25
(Equiv. 0.374 in.)
Knurled OD (B)
6.35
mm
+/- 0.102
Expansion Inserts - 10-24 UNC - 4.76mm - 6.34x9.5 mm Press In - Brass Insert
Material: Brass   
Part Number: IN-EP-048C-100-B (PK-10)
10 units (100 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$5.50 AUD
$5.50 AUD
Priced, Stocked and Sold Per 10 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 10 available can be backordered.
Expansion Inserts - 10-24 UNC - 4.76mm - 6.34x9.5 mm Press In - Brass Insert
Internal Thread
10-24 UNC (4.76mm)

Rec. Hole Diameter
6.34
mm
+ 0.000 / - 0.254
(Equiv. 0.25 in.)
Length (L)
9.50
mm
+/- 0.25
(Equiv. 0.374 in.)
Expansion Inserts - 10-24 UNC - 4.76mm - 6.34x9.5 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 6.35 mm +/- 0.102   
Part Number: IN-EP-048C-100-B (PK-10)
10 units (100 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$5.50 AUD
$5.50 AUD
Priced, Stocked and Sold Per 10 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

10 units (100 pcs) Available Now. Backorder if more than 10.
Expansion Inserts - 10-32 UNF - 4.76mm - 6.34x9.53 mm Press In - Brass Insert
Internal Thread
10-32 UNF (4.76mm)

Rec. Hole Diameter
6.34
mm
+ 0.000 / - 0.254
(Equiv. 0.25 in.)
Length (L)
9.53
mm
+/- 0.25
(Equiv. 0.375 in.)
Knurled OD (B)
6.35
mm
+/- 0.102
Expansion Inserts - 10-32 UNF - 4.76mm - 6.34x9.53 mm Press In - Brass Insert
Material: Brass   
Part Number: IN-EP-048F-100-B (PK-10)
4 units (40 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$7.95 AUD
$14.11 AUD $7.95 AUD
Priced, Stocked and Sold Per 10 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 4 available can be backordered.
Expansion Inserts - 10-32 UNF - 4.76mm - 6.34x9.53 mm Press In - Brass Insert
Internal Thread
10-32 UNF (4.76mm)

Rec. Hole Diameter
6.34
mm
+ 0.000 / - 0.254
(Equiv. 0.25 in.)
Length (L)
9.53
mm
+/- 0.25
(Equiv. 0.375 in.)
Expansion Inserts - 10-32 UNF - 4.76mm - 6.34x9.53 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 6.35 mm +/- 0.102   
Part Number: IN-EP-048F-100-B (PK-10)
4 units (40 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$7.95 AUD
$14.11 AUD $7.95 AUD
Priced, Stocked and Sold Per 10 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

4 units (40 pcs) Available Now. Backorder if more than 4.
Expansion Inserts - M6 - 6x1mm - 7.94x12.7 mm Press In - Brass Insert
Internal Thread
M6 (6x1mm)

Rec. Hole Diameter
7.94
mm
+ 0.000 / - 0.254
(Equiv. 0.313 in.)
Length (L)
12.70
mm
+/- 0.25
(Equiv. 0.5 in.)
Knurled OD (B)
7.95
mm
Expansion Inserts - M6 - 6x1mm - 7.94x12.7 mm Press In - Brass Insert
Material: Brass   
Part Number: IN-EP-060M-130-B (PK-10)
6 units (60 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$15.68 AUD
$15.68 AUD
Priced, Stocked and Sold Per 10 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 6 available can be backordered.
Expansion Inserts - M6 - 6x1mm - 7.94x12.7 mm Press In - Brass Insert
Internal Thread
M6 (6x1mm)

Rec. Hole Diameter
7.94
mm
+ 0.000 / - 0.254
(Equiv. 0.313 in.)
Length (L)
12.70
mm
+/- 0.25
(Equiv. 0.5 in.)
Expansion Inserts - M6 - 6x1mm - 7.94x12.7 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 7.95 mm   
Part Number: IN-EP-060M-130-B (PK-10)
6 units (60 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$15.68 AUD
$15.68 AUD
Priced, Stocked and Sold Per 10 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

6 units (60 pcs) Available Now. Backorder if more than 6.
Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.93x12.7 mm Press In - Brass Insert
Internal Thread
1/4-20 UNC (6.35mm)

Rec. Hole Diameter
7.93
mm
+ 0.000 / - 0.254
(Equiv. 0.312 in.)
Length (L)
12.70
mm
+/- 0.25
(Equiv. 0.5 in.)
Knurled OD (B)
7.94
mm
+/- 0.102
Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.93x12.7 mm Press In - Brass Insert
Material: Brass   
Part Number: IN-EP-064C-130-B (PK-5)
14 units (70 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$5.86 AUD
$5.86 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 14 available can be backordered.
Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.93x12.7 mm Press In - Brass Insert
Internal Thread
1/4-20 UNC (6.35mm)

Rec. Hole Diameter
7.93
mm
+ 0.000 / - 0.254
(Equiv. 0.312 in.)
Length (L)
12.70
mm
+/- 0.25
(Equiv. 0.5 in.)
Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.93x12.7 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 7.94 mm +/- 0.102   
Part Number: IN-EP-064C-130-B (PK-5)
14 units (70 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$5.86 AUD
$5.86 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

14 units (70 pcs) Available Now. Backorder if more than 14.
Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.52x14.3 mm Press In - Brass Insert
Internal Thread
5/16-18 UNC (7.94mm)

Rec. Hole Diameter
9.52
mm
+ 0.000 / - 0.254
(Equiv. 0.375 in.)
Length (L)
14.30
mm
+/- 0.25
(Equiv. 0.563 in.)
Knurled OD (B)
9.53
mm
+/- 0.102
Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.52x14.3 mm Press In - Brass Insert
Material: Brass   
Part Number: IN-EP-079C-140-B (Each)
20 Available Now | Further orders can be expected around Sun, Jan 18, 2026
$3.95 AUD
$6.69 AUD $3.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 20 available can be backordered.
Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.52x14.3 mm Press In - Brass Insert
Internal Thread
5/16-18 UNC (7.94mm)

Rec. Hole Diameter
9.52
mm
+ 0.000 / - 0.254
(Equiv. 0.375 in.)
Length (L)
14.30
mm
+/- 0.25
(Equiv. 0.563 in.)
Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.52x14.3 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 9.53 mm +/- 0.102   
Part Number: IN-EP-079C-140-B (Each)
20 Available Now | Further orders can be expected around Sun, Jan 18, 2026
$3.95 AUD
$6.69 AUD $3.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

20 Available Now. Backorder if more than 20.
Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Brass Insert
Internal Thread
3/8-16 UNC (9.53mm)

Rec. Hole Diameter
11.1
mm
+ 0.000 / - 0.254
(Equiv. 0.437 in.)
Length (L)
15.88
mm
+/- 0.25
(Equiv. 0.625 in.)
Knurled OD (B)
11.11
mm
+/- 0.102
Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Brass Insert
Material: Brass   
Part Number: IN-EP-095C-160-B (PK-2)
3 units (6 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$3.59 AUD
$6.22 AUD $3.59 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 3 available can be backordered.
Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Brass Insert
Internal Thread
3/8-16 UNC (9.53mm)

Rec. Hole Diameter
11.1
mm
+ 0.000 / - 0.254
(Equiv. 0.437 in.)
Length (L)
15.88
mm
+/- 0.25
(Equiv. 0.625 in.)
Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 11.11 mm +/- 0.102   
Part Number: IN-EP-095C-160-B (PK-2)
3 units (6 pcs) Available Now | Further orders can be expected around Sun, Jan 18, 2026
$3.59 AUD
$6.22 AUD $3.59 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

3 units (6 pcs) Available Now. Backorder if more than 3.