A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5915-01-056-5141
NSN 6645-01-044-6376
NSN 6150-01-400-4211
NSN 6135-01-412-0404
NSN 6610-00-769-6826
NSN 5990-01-080-0097
NSN 6685-00-261-9858
NSN 5835-01-111-0969
NSN 5835-01-441-4746
NSN 5905-00-102-0886
NSN 6145-00-803-9900
NSN 5905-00-409-8649