A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 5910-00-321-0229
NSN 5925-00-405-3363
NSN 5950-01-061-3357
NSN 5905-01-030-9192
NSN 5835-01-391-4556
NSN 6645-01-370-4259
NSN 6240-00-503-3506
NSN 6320-00-925-0558
NSN 6150-01-218-4974
NSN 5905-01-142-2894
NSN 5905-01-087-7000
NSN 6240-01-147-7494