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 4140-01-643-3391
NSN 6620-00-942-1751
NSN 5998-01-458-8053
NSN 4140-01-096-1596
NSN 5996-01-464-4359
NSN 6145-01-175-1100
NSN 6135-01-161-3914
NSN 5945-01-178-5177
NSN 5960-00-104-5955
NSN 6220-01-283-7868
NSN 6135-00-577-8429
NSN 5935-01-170-2815