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 6645-01-056-5291
NSN 5930-01-359-3218
NSN 5998-01-094-7974
NSN 5960-01-536-6398
NSN 4140-01-512-8528
NSN 5975-01-169-4619
NSN 6150-01-117-7618
NSN 5999-01-470-3541
NSN 6650-00-405-6323
NSN 6105-01-537-8640
NSN 5915-00-444-5125
NSN 6110-01-415-4046