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 5998-01-509-8497
NSN 6150-01-030-5952
NSN 5930-01-354-9903
NSN 6610-01-397-6965
NSN 6135-01-297-5565
NSN 4140-00-226-9807
NSN 5895-01-225-3309
NSN 5990-01-608-3505
NSN 6320-00-270-8222
NSN 5920-01-565-4729
NSN 6150-01-109-2266
NSN 6220-01-522-4937