A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5960-01-470-0909
NSN 5925-01-554-7852
NSN 5965-01-464-6225
NSN 5920-00-265-6222
NSN 5998-01-281-6384
NSN 6645-00-849-4429
NSN 5925-01-110-1918
NSN 5999-00-335-8486
NSN 6150-00-802-8362
NSN 6240-01-003-8666
NSN 5895-01-466-4780
NSN 5999-01-453-7562