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 6620-00-523-4973
NSN 6320-00-908-6841
NSN 5835-01-359-2575
NSN 6320-01-429-9871
NSN 6220-01-192-3451
NSN 6645-01-039-7225
NSN 5925-01-050-9661
NSN 6320-01-530-0588
NSN 6620-01-285-4685
NSN 6240-01-188-2745
NSN 5998-01-471-6554
NSN 6145-00-905-6797