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 5990-01-626-2818
NSN 5855-01-316-0752
NSN 5965-01-612-1537
NSN 5960-00-773-2406
NSN 5925-01-197-8406
NSN 6320-01-550-3420
NSN 6320-01-512-2031
NSN 5950-01-420-0828
NSN 5835-00-656-7317
NSN 5935-00-633-8302
NSN 6150-01-129-9304
NSN 6645-01-080-6052