Climax Metals C-031-BOX20 Shaft Collar with 10"-32" x 1/8 Set Screw, One Piece, Set Screw Style, Black Oxide Plating, Steel, Steel, 5/16" Bore Size, 5/8" OD (Pack of 20) 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 with a black oxide finish for a decorative appearance and for resistance to stick-slip, white corrosion, and abrasion 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)