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 5925-00-726-7838
NSN 6135-00-231-7257
NSN 6620-00-535-7667
NSN 5895-01-556-6857
NSN 6610-01-095-7219
NSN 6135-01-508-3784
NSN 6650-01-197-4585
NSN 5985-01-267-8817
NSN 5985-00-454-0728
NSN 6105-00-888-9977
NSN 5835-01-422-2399
NSN 6150-01-517-6586