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 6645-00-883-8086
NSN 6135-00-683-0536
NSN 5855-00-869-3635
NSN 6220-01-518-2433
NSN 5985-01-495-8839
NSN 5998-00-981-3372
NSN 6620-01-251-6844
NSN 5999-01-293-4921
NSN 6130-00-377-0655
NSN 5996-00-267-1139
NSN 5945-00-249-9894
NSN 6610-00-468-1958