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 6620-01-012-2852
NSN 6145-01-350-3264
NSN 5999-00-501-5007
NSN 6105-00-489-3169
NSN 5996-01-015-4142
NSN 6150-00-270-1001
NSN 5935-01-303-4601
NSN 2925-01-043-9786
NSN 5990-00-301-3386
NSN 5905-01-321-5122
NSN 5910-01-084-3345
NSN 2925-00-617-0826