A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6620-00-498-4190
NSN 5975-01-104-7028
NSN 6150-01-112-5142
NSN 6135-01-414-8831
NSN 6320-01-605-7059
NSN 7035-01-232-7263
NSN 5920-00-216-8665
NSN 6650-01-657-7864
NSN 6320-01-357-3222
NSN 7035-00-104-7613
NSN 5999-00-282-3150
NSN 5925-01-431-0405