A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6650-01-126-2029
NSN 6150-00-982-2066
NSN 6620-01-058-8676
NSN 5996-01-014-1703
NSN 6650-00-172-5983
NSN 2925-01-327-3069
NSN 5975-00-020-3271
NSN 5999-01-303-7514
NSN 6135-01-400-2947
NSN 5895-01-199-2511
NSN 5930-01-169-8655
NSN 6220-01-406-3167