Climax Metals 2C-037-ZX10 Two-Piece Clamping Collar, Zinc Plating, Steel, 3/8" Bore, 7/8" OD, 3/8" Width (Pack of 10) Two-piece clamping shaft collar for applications requiring a stronger holding power and higher axial load capacity than setscrew or one-piece clamping collars Effective on both hard and soft shafts Steel for weldability and rust resistance with zinc plating for better resistance to corrosion than black oxide steel Includes socket-head cap screws for securing the collar onto the shaft Operating temperatures range from -17 to 121 degrees C (0 to 250 degrees F)