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 5945-00-368-2593
NSN 6130-00-738-7290
NSN 2925-01-618-5706
NSN 5905-00-509-8821
NSN 5855-01-328-7434
NSN 6130-00-621-7997
NSN 6145-01-114-1014
NSN 5915-01-005-3047
NSN 5990-01-148-0435
NSN 5996-00-306-9644
NSN 5915-01-026-5142
NSN 5915-00-945-2953