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 6610-00-929-0225
NSN 6130-01-557-7699
NSN 6110-01-418-6589
NSN 6135-01-554-1842
NSN 5998-00-922-1611
NSN 5895-00-798-5798
NSN 6220-01-094-1207
NSN 4140-00-336-1728
NSN 5915-01-238-1120
NSN 5855-00-089-3974
NSN 2925-01-547-4565
NSN 5910-01-291-0698