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 5895-01-140-4046
NSN 6240-00-635-9953
NSN 5960-01-076-4708
NSN 5965-01-269-1960
NSN 5960-00-097-7007
NSN 6150-01-450-1176
NSN 5975-00-372-6265
NSN 5855-01-539-0639
NSN 5855-00-548-4742
NSN 5985-01-444-4578
NSN 5935-01-084-1377
NSN 5960-01-223-8357