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 5855-00-915-7942
NSN 6220-00-925-9497
NSN 5990-01-377-8991
NSN 6105-00-174-2911
NSN 5895-01-334-9431
NSN 5895-01-355-2963
NSN 5990-00-539-7859
NSN 5910-00-650-4949
NSN 5998-01-276-3037
NSN 6240-01-381-2275
NSN 4140-00-944-2557
NSN 4140-00-504-1829