A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6135-01-383-1910
NSN 5855-00-256-5562
NSN 6240-01-544-3710
NSN 2925-00-973-9413
NSN 5965-01-084-6921
NSN 5985-01-467-2632
NSN 5925-01-205-7482
NSN 5950-01-319-8129
NSN 6320-01-029-4220
NSN 6130-00-098-7622
NSN 6645-00-472-4048
NSN 5930-01-540-3825