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 5920-01-252-8660
NSN 6620-01-166-1866
NSN 5960-01-187-3103
NSN 5935-01-632-5345
NSN 6105-01-019-3931
NSN 6240-01-032-4558
NSN 4140-00-433-9571
NSN 6220-00-886-1791
NSN 5925-01-608-4702
NSN 5910-00-432-6796
NSN 6620-00-332-5550
NSN 5990-00-848-8870