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 2925-01-180-2149
NSN 5930-01-654-5679
NSN 6685-01-188-2917
NSN 6105-01-068-8143
NSN 6145-01-202-3539
NSN 6650-00-575-7487
NSN 5998-01-403-2586
NSN 5960-01-201-4249
NSN 5985-01-183-8218
NSN 5930-01-204-7326
NSN 5855-01-364-8193
NSN 6620-01-534-7180