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 5930-01-481-4233
NSN 7035-00-155-9513
NSN 6110-00-878-9118
NSN 5999-00-552-2165
NSN 5895-00-308-6555
NSN 5925-00-009-9818
NSN 5990-01-503-9804
NSN 4140-01-165-6409
NSN 5960-00-148-4493
NSN 5965-00-246-5612
NSN 2925-01-612-0405
NSN 6645-01-351-6900