A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5915-00-247-8770
NSN 6620-01-285-4685
NSN 5915-00-956-2933
NSN 6685-01-123-8900
NSN 5925-01-600-0447
NSN 5930-01-242-9319
NSN 5915-00-953-4355
NSN 5975-01-339-1380
NSN 6145-01-091-4652
NSN 6150-00-553-7587
NSN 5905-00-900-5490
NSN 5935-01-317-9368