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 5915-01-237-0683
NSN 5945-00-510-4293
NSN 6240-01-183-0893
NSN 5930-01-470-2352
NSN 6110-01-411-6660
NSN 6620-01-535-6925
NSN 5935-01-634-0668
NSN 5925-01-544-4287
NSN 5950-00-636-3063
NSN 7035-00-529-3128
NSN 5905-01-534-7894
NSN 2925-00-265-7539