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 5935-00-241-0383
NSN 6145-01-627-6692
NSN 5965-01-083-5278
NSN 5990-00-138-0854
NSN 6320-00-382-7825
NSN 5965-01-303-6105
NSN 5855-00-688-9954
NSN 6320-01-381-7023
NSN 6220-00-770-7658
NSN 5915-01-173-9026
NSN 5835-01-172-5884
NSN 6620-01-464-3087