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 6610-00-667-6832
NSN 6135-01-351-2690
NSN 5965-00-513-1352
NSN 5996-00-542-3997
NSN 6320-01-115-4404
NSN 6645-01-114-8044
NSN 5930-01-612-4845
NSN 5945-01-504-8945
NSN 5990-00-382-5885
NSN 5965-01-392-1761
NSN 5975-01-374-6988
NSN 6150-00-350-8202