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 5935-00-598-6126
NSN 5965-01-619-6046
NSN 5925-00-900-0675
NSN 6320-00-174-1362
NSN 6685-01-236-6698
NSN 5975-00-594-8857
NSN 6685-01-340-2480
NSN 6610-00-536-4977
NSN 2925-00-781-8421
NSN 5945-01-475-4950
NSN 6145-01-394-3122
NSN 5935-01-411-6300