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 6145-01-105-4583
NSN 5910-01-555-7751
NSN 7035-01-192-9989
NSN 5915-01-226-8206
NSN 6105-00-038-7518
NSN 5855-01-463-4839
NSN 5975-00-763-5437
NSN 5945-00-686-6066
NSN 6320-01-106-4414
NSN 6645-00-816-5337
NSN 5999-00-316-6142
NSN 5935-00-243-8575