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 6610-01-389-0620
NSN 5930-00-291-5400
NSN 6620-01-591-6681
NSN 6685-01-208-8641
NSN 6150-00-036-5699
NSN 6105-01-509-1027
NSN 5960-01-163-6416
NSN 5855-00-100-9003
NSN 5960-01-370-4285
NSN 5910-01-125-8194
NSN 5950-00-884-6522
NSN 5960-00-538-6581