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 6620-01-633-8443
NSN 5998-01-084-0723
NSN 6620-00-068-2503
NSN 5930-00-035-8436
NSN 6685-01-429-8298
NSN 5910-01-633-9963
NSN 6240-01-503-8717
NSN 5920-01-441-4341
NSN 5910-00-333-7944
NSN 6320-01-493-4472
NSN 5915-00-131-6344
NSN 5999-00-514-3388