A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5910-01-383-0274
NSN 6135-01-597-1901
NSN 6240-00-866-6239
NSN 6240-00-166-2271
NSN 7035-01-252-5919
NSN 6320-00-853-1920
NSN 6645-01-500-0827
NSN 5985-01-270-6888
NSN 5905-01-634-0595
NSN 5905-00-442-4236
NSN 6220-01-471-6219
NSN 6135-01-040-1446