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 5996-00-676-2674
NSN 5915-01-169-1594
NSN 6220-01-242-6094
NSN 6685-00-363-1701
NSN 5965-00-562-8933
NSN 5915-01-352-7831
NSN 5935-00-828-9979
NSN 6145-01-376-0968
NSN 6145-00-435-4013
NSN 5910-01-443-3625
NSN 7035-01-302-3914
NSN 4140-01-447-7282