A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5950-01-089-9712
NSN 6240-00-919-9186
NSN 5945-00-203-5575
NSN 5855-01-364-1005
NSN 6610-01-435-8982
NSN 5998-01-224-5964
NSN 6130-01-188-4574
NSN 6105-00-933-5161
NSN 2925-01-486-7277
NSN 5945-00-149-0619
NSN 6220-01-321-5864
NSN 6130-00-872-1482