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 6105-01-601-2468
NSN 6135-01-375-6724
NSN 5945-01-437-3454
NSN 5905-01-151-9768
NSN 5920-00-488-9359
NSN 6610-01-387-0676
NSN 6240-01-211-4507
NSN 5998-01-287-8523
NSN 6145-00-600-6359
NSN 6110-01-199-4936
NSN 6150-01-454-0906
NSN 6620-01-197-7665