A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6110-01-411-2920
NSN 5965-01-087-2987
NSN 5975-00-008-7834
NSN 5975-01-622-7698
NSN 5930-01-386-7503
NSN 5950-00-578-0770
NSN 5930-00-555-3007
NSN 6145-01-073-1509
NSN 6645-00-716-8049
NSN 7035-00-150-2379
NSN 6130-01-374-3192
NSN 5855-01-591-0466