A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5910-01-531-8685
NSN 7035-00-126-1899
NSN 6645-00-216-6126
NSN 6620-00-836-0399
NSN 6130-00-173-6062
NSN 5960-01-306-4606
NSN 6645-01-214-6309
NSN 5920-01-539-6893
NSN 5910-00-585-0361
NSN 5985-01-157-8894
NSN 6130-01-340-3670
NSN 6610-00-928-7642