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 6645-00-482-2737
NSN 6320-00-682-3448
NSN 5930-01-397-5603
NSN 5905-01-051-6695
NSN 6130-01-523-4489
NSN 6105-01-325-2509
NSN 5999-01-485-0316
NSN 5920-00-647-3467
NSN 5945-00-428-6353
NSN 5999-00-283-1134
NSN 6150-00-208-1741
NSN 6145-00-168-8470