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 6110-00-421-3549
NSN 5910-01-413-4420
NSN 6150-01-425-1667
NSN 6610-00-899-1751
NSN 5960-01-290-2604
NSN 2925-01-588-3507
NSN 5835-00-665-3395
NSN 5910-01-170-4002
NSN 6135-01-142-2417
NSN 5965-01-398-2514
NSN 5925-01-431-3702
NSN 6145-00-331-6814