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 5960-01-151-4518
NSN 6685-01-099-6261
NSN 7035-01-438-2108
NSN 6240-00-141-6143
NSN 6320-01-033-6624
NSN 6220-01-287-6029
NSN 5855-01-366-2429
NSN 5935-01-054-0346
NSN 5935-01-170-4158
NSN 6105-01-468-0532
NSN 5915-01-375-7981
NSN 6110-00-549-6662