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 6650-01-050-8680
NSN 5990-01-554-8547
NSN 6135-01-412-8929
NSN 5965-00-222-7394
NSN 5895-01-307-2789
NSN 5996-00-079-7045
NSN 5915-01-318-0720
NSN 6320-01-409-1388
NSN 6240-01-182-5859
NSN 5998-01-063-4667
NSN 6240-01-194-2206
NSN 7035-00-510-3778