A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6645-00-775-2172
NSN 6220-01-535-0892
NSN 5905-01-388-7278
NSN 5855-01-098-9038
NSN 5990-00-258-0228
NSN 6645-01-058-3817
NSN 6685-01-206-2681
NSN 6620-00-724-3137
NSN 5905-01-615-0970
NSN 5930-00-516-1217
NSN 5985-01-347-7044
NSN 4140-00-895-9624