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 5945-01-211-6085
NSN 6105-00-760-2943
NSN 5920-01-499-9888
NSN 5998-01-535-9967
NSN 5910-01-281-6408
NSN 5925-01-150-6502
NSN 4140-01-310-5045
NSN 5975-01-158-2749
NSN 6145-01-259-5525
NSN 5835-00-660-4523
NSN 6685-01-378-4224
NSN 6645-00-918-3785