Summit Collars, RC-062 5/8″ RIGID Set Screw COUPLING BLACK OXIDE FINISH
Bore: 5/8″ Outer Diameter: 1-1/4″ Width: 2″ Screws: 4 @ 5/16-18″ Weight: 8 oz each Set Screw Couplings are the most cost effective Rigid Coupling, stock in black oxide however, we can quote stainless steel rigid couplings on request. Standard sizes 1/4″ to 1 1/2″ Inside Diameter (ID).