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 5930-00-725-2080
NSN 5905-01-492-6030
NSN 6220-01-411-1173
NSN 5985-01-230-2384
NSN 4140-01-307-8836
NSN 5998-00-736-4662
NSN 5998-01-352-3570
NSN 5910-00-371-2951
NSN 5835-01-656-2940
NSN 5998-01-086-5329
NSN 2925-01-197-7864
NSN 5975-00-186-8884