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 5935-01-010-8931
NSN 6240-00-030-5148
NSN 6130-00-280-3696
NSN 6150-01-239-1719
NSN 5855-00-233-2366
NSN 6135-01-576-9616
NSN 4140-01-475-0373
NSN 5945-01-094-2221
NSN 7035-01-541-5414
NSN 5935-00-615-9436
NSN 5930-01-160-4952
NSN 6150-01-253-8746