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 6320-00-194-4252
NSN 6145-01-422-1830
NSN 5920-00-529-0618
NSN 5965-01-292-0035
NSN 5996-00-456-0895
NSN 7035-00-803-3056
NSN 5945-01-102-6062
NSN 6130-00-372-4322
NSN 5945-01-287-0094
NSN 5920-00-539-7847
NSN 6220-01-084-8619
NSN 6110-00-904-3328