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 5999-01-538-0551
NSN 5915-01-359-4847
NSN 5950-01-496-6610
NSN 5905-01-282-0773
NSN 5998-01-278-7893
NSN 6105-00-021-3666
NSN 5990-01-291-0600
NSN 5915-01-347-0104
NSN 5855-00-797-8217
NSN 4140-01-342-1345
NSN 5905-00-116-8881
NSN 5960-01-296-3306