A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5920-01-409-2830
NSN 5998-01-477-2339
NSN 5935-01-274-2046
NSN 6685-01-301-5950
NSN 4140-00-293-7847
NSN 5855-01-406-4821
NSN 6645-01-274-8770
NSN 6620-01-431-0706
NSN 6320-01-422-1212
NSN 5975-00-719-9793
NSN 5855-00-832-9341
NSN 6145-01-433-6858