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 5920-00-119-1406
NSN 5998-00-344-1675
NSN 6650-01-250-3989
NSN 5930-00-193-0202
NSN 2925-01-014-8007
NSN 6150-00-604-8719
NSN 6105-01-068-4366
NSN 5835-00-501-2581
NSN 6685-00-526-9192
NSN 6145-01-210-5047
NSN 4140-01-410-7626
NSN 6650-00-391-8404