Climax Metals C-137-DTX10 Set Screw Collar, Steel, 1-3/8" Bore Size, 2-1/8" OD with 3/8"-16 x 3/8" Set Screw (Pack of 10) Setscrew shaft collar for applications supporting low axial loads and simple positioning Effective on shafts made of softer material than the setscrew material Steel for weldability and rust resistance Includes a socket setscrew for securing the collar onto the shaft Operating temperatures range from -17 to 148 degrees C (0 to 300 degrees F)