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 5935-00-358-3950
NSN 6650-01-576-8520
NSN 6150-01-057-4877
NSN 6110-01-268-1723
NSN 5975-01-214-1438
NSN 6220-00-823-6688
NSN 5920-01-407-9623
NSN 6620-01-449-3101
NSN 5895-01-125-7247
NSN 6130-00-115-2933
NSN 5960-00-011-4910
NSN 6150-01-537-0495