One-Piece Clamping Collar Recessed Screw H1C-Series, Climax Metal, 3/16″ bore, 13/16″ outside diameter.

Black Oxide Plated Steel One-Piece Clamping Collar – Recessed Screw Head. Recessed Screw Head provides an outside surface free of major projections for safety. Design fully engages the shaft without marring. Greater axial holding power than set screw collars. Effective on hard & soft shafts.