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 5990-01-434-7913
NSN 6320-01-512-2031
NSN 5920-01-508-3614
NSN 6130-01-494-9515
NSN 5990-01-467-7575
NSN 5998-00-824-6336
NSN 6645-00-942-1039
NSN 6145-01-527-9377
NSN 5855-01-455-4910
NSN 4140-00-351-7085
NSN 6685-01-482-0452
NSN 5910-01-435-4717