A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6145-00-168-8687
NSN 5905-00-787-2749
NSN 7035-00-117-0418
NSN 6645-01-215-7247
NSN 2925-00-569-2981
NSN 6645-01-355-9733
NSN 5990-00-856-9208
NSN 5910-01-422-9760
NSN 6645-00-987-3409
NSN 5930-01-493-1690
NSN 5960-01-222-0074
NSN 5915-00-943-7437