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 5950-01-267-3982
NSN 5930-00-987-3541
NSN 5925-00-125-0853
NSN 6110-00-901-9820
NSN 5930-00-870-4631
NSN 5945-01-276-6263
NSN 6320-01-552-8721
NSN 5855-00-323-0967
NSN 6650-01-129-2886
NSN 6240-01-437-9439
NSN 6220-01-394-4972
NSN 6650-01-406-5322