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 6130-01-093-5804
NSN 5910-01-333-6421
NSN 5935-01-435-2799
NSN 5930-01-278-3381
NSN 5920-01-451-3882
NSN 6150-01-520-3624
NSN 6320-01-352-8084
NSN 5965-01-553-0597
NSN 5855-01-634-0259
NSN 6620-01-262-9489
NSN 5960-01-486-8919
NSN 5920-01-088-7958