A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5895-00-292-2872
NSN 2925-01-164-4197
NSN 6650-01-512-1930
NSN 6645-01-473-1371
NSN 5835-01-281-7281
NSN 6620-00-148-9613
NSN 6650-00-213-7065
NSN 6150-00-032-5815
NSN 5998-01-145-3898
NSN 6220-00-282-9714
NSN 6650-00-102-2606
NSN 6610-01-435-5425