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 6610-00-764-6627
NSN 5985-01-164-3564
NSN 6320-01-125-3361
NSN 5915-01-543-0632
NSN 5835-01-133-6485
NSN 5950-01-400-3577
NSN 6685-00-078-0098
NSN 5930-01-378-4881
NSN 6105-01-442-5644
NSN 6105-01-270-6310
NSN 5935-01-370-4081
NSN 4140-00-871-9619