Climax Metals 1C-037-ZX10 One-Piece Clamping Collar, Zinc Plating, Steel, 3/8" Bore, 7/8" OD, 3/8" Width (Pack of 10) One-piece clamping shaft collar for applications requiring a more uniform holding power and higher axial load capacity than setscrew 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)