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 7035-01-127-0147
NSN 5960-01-308-6421
NSN 6320-01-220-2264
NSN 5895-01-570-7645
NSN 5905-00-959-3159
NSN 6320-00-894-1644
NSN 5990-01-262-7981
NSN 6130-01-447-0959
NSN 6240-01-541-9298
NSN 5895-01-473-8495
NSN 6320-00-476-6898
NSN 5999-01-134-5406