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 5905-01-091-5138
NSN 4140-01-565-3744
NSN 5999-01-359-2087
NSN 5999-01-446-4161
NSN 6130-01-259-3074
NSN 5835-01-324-6443
NSN 6105-00-740-7757
NSN 6645-01-311-9794
NSN 5985-01-360-5617
NSN 6620-00-724-3137
NSN 5975-00-768-7518
NSN 7035-01-281-3642