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 7035-01-241-2127
NSN 5945-01-489-5519
NSN 6240-01-642-9552
NSN 5965-01-479-5620
NSN 5985-01-298-4543
NSN 5999-01-407-0404
NSN 6150-01-220-4425
NSN 6645-01-270-3176
NSN 5895-00-325-9036
NSN 6620-00-211-9077
NSN 6145-00-076-9324
NSN 6645-01-351-6900