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 5915-01-417-6979
NSN 5835-01-359-2575
NSN 6220-01-440-6100
NSN 7035-01-251-6809
NSN 5930-01-307-4743
NSN 5910-00-540-9585
NSN 6130-01-018-7988
NSN 5935-00-174-5789
NSN 6610-01-047-7245
NSN 6135-01-292-1071
NSN 5905-01-357-1110
NSN 4140-00-921-3814