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 6145-01-244-1205
NSN 5905-01-212-9159
NSN 5855-01-423-0817
NSN 6220-01-544-5793
NSN 5999-01-617-4931
NSN 5910-00-884-8292
NSN 5945-00-136-5434
NSN 4140-01-138-4889
NSN 6220-01-025-6140
NSN 5835-00-594-4921
NSN 5925-01-051-1239
NSN 5935-00-339-9011