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 6685-01-010-2663
NSN 5925-00-629-1974
NSN 6620-01-354-8472
NSN 5935-00-674-5859
NSN 6150-01-099-2818
NSN 6685-00-729-6498
NSN 5920-00-057-5934
NSN 5996-01-134-9679
NSN 6610-00-081-2365
NSN 6110-01-333-7923
NSN 6145-01-317-2686
NSN 5998-01-026-0684