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 6650-01-395-5991
NSN 6220-01-144-2532
NSN 5965-00-777-7037
NSN 5835-01-384-3206
NSN 5950-00-540-9283
NSN 6130-01-371-2960
NSN 5835-00-902-8680
NSN 6645-01-268-4045
NSN 5998-01-474-6548
NSN 4140-00-816-8820
NSN 5965-00-267-4173
NSN 6130-00-089-5989