A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5855-01-344-8688
NSN 7035-01-352-6235
NSN 6650-00-420-3593
NSN 6150-00-089-9503
NSN 7035-01-529-0126
NSN 6220-01-200-6461
NSN 5930-00-366-6495
NSN 6145-00-922-6335
NSN 6110-00-144-3159
NSN 5990-01-107-1003
NSN 6320-01-592-6248
NSN 5835-01-460-6054