Climax Metal TC-050-13-S Shaft Collar, One Piece, Threaded, Stainless Steel, 1/2-13 Internal Thread, 1-1/4" OD, 3/8" Width, With 8-32 x 1/2 Clamp Screw: Setscrew Shaft Collars: Amazon.com: Industrial & Scientific
Amazon.com: Stop Collar, M5x0.8mm Thread Drill Bit Depth Shaft Kit Good Balance Aluminum 6mm Centre Bore 2Pcs Small Vibration for Maintenance : Tools & Home Improvement