Collection: Collars - Hex Bore - Two Piece

Collars -> Hex Bore -> Two Piece

There are 2 products in the sub-categories of Collars - Hex Bore - Two Piece. Browse the Collars - Hex Bore - Two Piece products table. To narrow down the selection, please choose a sub-category from the links below.

Category Details

This category includes various types of hex bore collars.
  • Simple, ring-shaped component, typically made of metal or plastic, that fastens around a hex shaped shaft to hold other parts in place or to act as a mechanical stop.
  • Essential in power transmission applications for securing items like bearings, sprockets, and gear assemblies.

Small Parts & Bearings

Additional resources:


A more comprehensive listing may be found in the Collars - Hex Bore - Two Piece category on the MBA Minibearings main store.
Suitable Shaft Size (d) Outside Diameter (D) Overall Width (S) Screw Size Indicative
Image
Suitable Shaft Size (d)
6.350
mm

(Equiv. 0.25 in.)
Outside Diameter (D)
20.70
mm

(Equiv. 0.815 in.)
Overall Width (S)
6.4
mm

(Equiv. 0.252 in.)
Screw Size
4-40 UNC
Hex Bore Collars - 6.35x20.7x6.4 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80   
Category: Collars - Hex Bore - Two Piece - 303 Stainless Steel
Part Number: COH-00635-021-06-2P-S3 (Each)
Hex Bore Collars - 6.35x20.7x6.4 mm Two Piece - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Collar
Out of Stock | Backorder Now | Orders can be expected around Mon, Dec 29, 2025
Regular price $136.41 AUD
Regular price Sale price $136.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Suitable Shaft Size (d) Outside Diameter (D) Overall Width (S) Indicative
Image
Suitable Shaft Size (d)
6.350
mm

(Equiv. 0.25 in.)
Outside Diameter (D)
20.70
mm

(Equiv. 0.815 in.)
Overall Width (S)
6.4
mm

(Equiv. 0.252 in.)
Hex Bore Collars - 6.35x20.7x6.4 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Screw Size: 4-40 UNC   
Category: Collars - Hex Bore - Two Piece - 303 Stainless Steel
Part Number: COH-00635-021-06-2P-S3 (Each)
Hex Bore Collars - 6.35x20.7x6.4 mm Two Piece - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Collar
Out of Stock | Backorder Now | Orders can be expected around Mon, Dec 29, 2025
Regular price $136.41 AUD
Regular price Sale price $136.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Suitable Shaft Size (d)
25.400
mm

(Equiv. 1 in.)
Outside Diameter (D)
54.00
mm

(Equiv. 2.126 in.)
Overall Width (S)
12.7
mm

(Equiv. 0.5 in.)
Screw Size
1/4-28 UNF (6.35mm)
Hex Bore Collars - 25.4x54x12.7 mm - Steel - Mild
Material: Steel - Mild   
Category: Collars - Hex Bore - Two Piece - Steel
Part Number: COH-02540-054-13-2P-CS (Each)
Hex Bore Collars - 25.4x54x12.7 mm Two Piece - Steel - Mild Collar
1 Available Now | Further orders can be expected around Mon, Dec 29, 2025
Regular price $98.86 AUD
Regular price $118.64 AUD Sale price $98.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. Backorder if more than 1.
Suitable Shaft Size (d)
25.400
mm

(Equiv. 1 in.)
Outside Diameter (D)
54.00
mm

(Equiv. 2.126 in.)
Overall Width (S)
12.7
mm

(Equiv. 0.5 in.)
Hex Bore Collars - 25.4x54x12.7 mm - Steel - Mild
Material: Steel - Mild    Screw Size: 1/4-28 UNF (6.35mm)   
Category: Collars - Hex Bore - Two Piece - Steel
Part Number: COH-02540-054-13-2P-CS (Each)
Hex Bore Collars - 25.4x54x12.7 mm Two Piece - Steel - Mild Collar
1 Available Now | Further orders can be expected around Mon, Dec 29, 2025
Regular price $98.86 AUD
Regular price $118.64 AUD Sale price $98.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. Backorder if more than 1.