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 5920-01-084-7975
NSN 6130-00-260-1791
NSN 6240-01-098-4294
NSN 6135-01-383-1910
NSN 5895-01-063-6823
NSN 5920-01-060-5429
NSN 5835-00-887-6420
NSN 5990-01-017-0263
NSN 6135-00-269-5843
NSN 5920-01-643-8942
NSN 6110-01-072-0892
NSN 6105-01-152-2800