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 6685-00-919-8714
NSN 5945-01-547-2464
NSN 6105-01-588-5587
NSN 5945-01-395-1982
NSN 6645-01-560-3034
NSN 5910-01-556-8008
NSN 6645-00-359-5463
NSN 5920-00-114-4221
NSN 6610-01-100-3662
NSN 6650-01-579-3855
NSN 5935-00-495-8474
NSN 6220-00-253-3836