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 6645-01-511-3272
NSN 5905-01-428-8932
NSN 5905-00-143-0943
NSN 2925-01-074-9102
NSN 6150-01-460-7359
NSN 5999-00-552-7477
NSN 6105-01-487-3686
NSN 5930-00-910-8954
NSN 4140-01-273-0196
NSN 6110-01-487-3636
NSN 6130-01-510-3791
NSN 7035-00-890-7649