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 5930-01-353-1638
NSN 5835-01-316-3255
NSN 5930-00-518-1638
NSN 5950-01-010-8951
NSN 5905-01-430-7231
NSN 6220-00-553-8938
NSN 5925-00-140-2359
NSN 6610-01-484-8980
NSN 6620-00-710-6847
NSN 5910-00-276-3187
NSN 6135-01-110-9470
NSN 5990-01-218-5160