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 6645-01-131-9664
NSN 5960-00-372-4876
NSN 6320-01-203-4303
NSN 6320-01-607-1491
NSN 6220-00-005-7872
NSN 5998-01-129-7949
NSN 5935-01-023-1445
NSN 5835-01-495-0595
NSN 5930-01-239-7968
NSN 2925-01-063-7876
NSN 6685-01-014-2049
NSN 5996-01-321-3092