A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5998-00-723-2518
NSN 6105-01-369-3251
NSN 6110-00-647-3932
NSN 5915-01-009-8422
NSN 5855-01-655-9531
NSN 6650-00-925-1274
NSN 5895-00-421-8632
NSN 5985-01-028-6296
NSN 6650-00-614-1711
NSN 5990-00-085-4299
NSN 6130-01-305-0463
NSN 7035-01-339-5480