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 5910-01-300-3183
NSN 6320-00-360-1744
NSN 6620-00-186-8220
NSN 5855-01-653-4319
NSN 6320-01-321-7658
NSN 6220-01-472-3785
NSN 6320-01-466-4175
NSN 7035-01-560-2623
NSN 5915-01-492-5333
NSN 5960-00-578-1920
NSN 5975-01-632-8094
NSN 6130-00-185-4522