A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6620-01-165-8958
NSN 5996-00-875-4967
NSN 6650-00-221-9425
NSN 5855-01-373-7538
NSN 5930-01-486-2164
NSN 5960-01-423-1085
NSN 6135-00-235-1938
NSN 5855-01-342-9778
NSN 6685-01-311-0385
NSN 5905-00-767-1720
NSN 5855-01-038-2189
NSN 6620-01-535-5495