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 5925-01-075-6783
NSN 5960-00-907-9161
NSN 5855-01-023-3727
NSN 5895-00-019-3428
NSN 5915-01-411-5355
NSN 5915-01-159-6026
NSN 2925-00-710-6161
NSN 5990-01-529-7307
NSN 5998-01-445-0228
NSN 5960-01-409-1917
NSN 6610-00-369-6661
NSN 5835-00-170-5238