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 5999-00-712-1482
NSN 5855-01-522-4471
NSN 5835-01-317-4840
NSN 5935-00-229-8991
NSN 2925-01-303-5266
NSN 6145-00-721-4066
NSN 6105-01-194-5999
NSN 6130-01-332-0315
NSN 6320-01-134-7267
NSN 6145-01-086-5029
NSN 5905-01-426-8975
NSN 5895-00-067-9058