2-3/4" Bore; Shaft Collar; Steel; 4" Outside Diameter; 1-1/8" Width; One Set Screw; 1/2-13 X 1/2 Set Screw Size; One Piece Solid

1-11/16" Bore; Shaft Collar; Steel; 2-3/4" Outside Diameter; 11/16" Width; 5/16-24 X 1 Clamp Screw Size; Two Piece Split

Clamping Coupling; Two-Piece; Recessed Screw

Clamping Coupling; Two-Piece; Recessed Screw; With Keyway 2CC-Series

1-5/8" Bore; Shaft Collar; Steel; 2-5/8" Outside Diameter; 11/16" Width; 5/16-24 X 1 Clamp Screw Size; Two Piece Split