A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5965-01-384-1953
NSN 5905-01-313-0519
NSN 5950-01-359-4385
NSN 6650-01-012-3290
NSN 2925-01-535-3167
NSN 5855-01-621-0215
NSN 6145-01-216-5305
NSN 6320-01-331-6947
NSN 5998-01-068-2000
NSN 6220-00-358-9580
NSN 5975-01-352-7829
NSN 6130-01-195-4304