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 6610-01-109-8552
NSN 5999-01-498-4843
NSN 6650-00-859-1859
NSN 5999-00-901-6246
NSN 5915-01-389-6081
NSN 5910-00-385-1149
NSN 6130-01-024-9968
NSN 5985-00-017-9690
NSN 6650-01-124-4314
NSN 6150-01-645-3897
NSN 5920-01-302-4270
NSN 5925-01-054-3453