A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5920-01-064-0939
NSN 5895-01-485-3069
NSN 6240-01-563-1652
NSN 6645-00-825-2448
NSN 6240-01-444-2227
NSN 5990-01-309-5840
NSN 5920-00-950-7457
NSN 6320-01-265-0665
NSN 5990-01-365-3453
NSN 5855-00-560-0110
NSN 5965-00-764-1841
NSN 6220-01-413-6506