Abstract: A strain relief device comprises a bushing for being mounted for rotation in a hole in a support member. The bushing has a flange at one end that prevents it from sliding through the hole and it has an axial internally threaded bore. A collet that has an axial bore, and external thread at one end and a tapered or conical portion contiguous with the thread screws into the bushing thread from the side of the support member opposite from the flange on the bushing. As the threaded end of the collet advances it causes the conical portion to wedge in the hole and be pressed radially inwardly for gripping a cable which has been passed through the collet and bushing.