• Mount square shafts or structural tubing to components
  • Can be placed anywhere on shaft
  • Supplied with mounting screw
Square Bore Shaft Mounting Collars are designed for use on standard square shafts or structural tubing. They can be completely disassembled and placed anywhere on a shaft. They are precision machined, non-marring, easy to adjust, with high clamping power.

These collars feature a two-piece construction with flats on outside surfaces which are drilled and tapped for attachment to each other or to other components. Also included is a countersunk hole for mounting to any surface. These collars are stackable, secure and easy to open and adjust.

The regular Stackable version has flats on two surfaces for stacking. The Stackable (Cap) version has a single flat to leave a finished outside surface when no further stacking is required.

Stocked in:
  • Steel
  • Stainless Steel
  • Aluminum
Unit of Measure


Part Number  

N/A 15S104ST


N/A Solution


N/A Stainless Steel


N/A 303


N/A Shiny


N/A High Strength

Approximate Weight

N/A 0.84 lb

Country of Origin


UPC Code

N/A 662786033155

RoHS2 Compliant

N/A Yes

REACH Compliant

N/A Yes

Dimensional Attributes

Bore Size

N/A 1-1/4 in

Outside Diameter

N/A 3.000 in


N/A 0.625 in

Recessed Screw

N/A Yes

Screw Size

N/A 5/16-24 x 1

Screw Material

N/A 18-8 Stainless Steel

Distance Across Flats

N/A 2.812 in

Top Threaded Hole

N/A 1/4-20

Bottom Threaded Hole

N/A 5/16-18

Mounting Screw

N/A 10-24 Flat Head Cap Screw