1-Piece Clamping Collars are designed to handle applications that require a greater axial load capacity than Setscrew Collars without marring the shaft. Recessed screw styles of 1-Piece Clamping Collars are available to provide safety with an outside surface free of major projections. Climax Clamping Collar, Industry Standard, Series: 1C Series, 1-Piece Split Construction, 1-3/8 in ID, 2-1/4 in OD, 9/16 in Width, Hex Socket Cap Screw Screw Style, 1/4-28 UN-3A x 3/4 in Screw, Steel, Black Oxide