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 5905-00-722-1540
NSN 5905-01-590-3546
NSN 5950-00-254-5905
NSN 5945-00-586-7678
NSN 6650-01-521-5903
NSN 6150-01-620-2687
NSN 5950-01-257-4424
NSN 5996-01-519-5346
NSN 5965-00-071-0562
NSN 7035-00-020-2227
NSN 6105-01-537-0105
NSN 5915-01-650-1733