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 5950-01-198-2533
NSN 6650-00-740-7338
NSN 5835-00-491-3834
NSN 5975-01-117-3271
NSN 6650-01-249-3201
NSN 5905-00-860-9666
NSN 6650-00-067-3572
NSN 6105-01-340-0399
NSN 6610-00-469-8534
NSN 6110-00-399-1413
NSN 2925-00-617-0826
NSN 5945-01-400-1145