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 5935-01-074-0653
NSN 6240-01-160-8975
NSN 5998-00-623-2954
NSN 5960-01-183-3779
NSN 5935-00-853-3320
NSN 5925-00-013-1258
NSN 6130-00-778-4442
NSN 5950-00-548-4827
NSN 6105-00-593-3817
NSN 5975-01-175-2810
NSN 5925-01-347-7140
NSN 5996-01-282-9635