A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5960-00-481-6677
NSN 4140-00-066-0538
NSN 6610-01-408-9557
NSN 5999-01-394-5186
NSN 6320-00-194-4252
NSN 5855-01-149-4110
NSN 7035-01-422-9483
NSN 6240-00-010-7334
NSN 5905-01-242-9357
NSN 5855-01-118-2228
NSN 4140-01-264-9640
NSN 5910-01-021-1518