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 6240-01-042-3650
NSN 7035-01-271-1643
NSN 6650-01-291-3164
NSN 6620-00-193-9503
NSN 5945-00-204-9949
NSN 6320-01-575-6342
NSN 5985-01-063-4001
NSN 5835-01-294-5753
NSN 6240-01-330-8126
NSN 5975-00-513-2712
NSN 6610-00-730-5883
NSN 2925-01-422-9284