A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6110-01-086-4204
NSN 5990-00-014-2310
NSN 5925-01-634-0664
NSN 5930-01-462-2516
NSN 6620-01-219-9413
NSN 5935-01-073-7407
NSN 5855-01-128-1762
NSN 5985-01-423-1057
NSN 6320-01-032-9703
NSN 6620-01-646-2751
NSN 6145-01-540-5898
NSN 5999-01-591-3106