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 6620-00-610-1272
NSN 6130-00-580-3725
NSN 5945-01-082-9535
NSN 4140-00-765-4594
NSN 6610-00-264-0961
NSN 7035-01-605-6368
NSN 6130-01-318-8012
NSN 5965-01-122-7477
NSN 5996-01-053-1617
NSN 6220-01-329-8154
NSN 4140-01-514-7379
NSN 6150-01-364-8688