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 6620-01-605-1465
NSN 6645-01-440-8624
NSN 5910-00-966-4564
NSN 7035-01-398-1655
NSN 6685-00-269-0438
NSN 6130-01-496-6979
NSN 6110-00-318-6053
NSN 5985-01-308-1821
NSN 5925-00-966-7171
NSN 6150-01-622-8928
NSN 5996-01-518-1502
NSN 5960-01-553-4557