A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5935-00-520-8674
NSN 5990-00-963-1799
NSN 6610-01-224-7247
NSN 6685-01-411-5286
NSN 5835-01-281-7281
NSN 5910-01-188-6858
NSN 5910-01-329-6262
NSN 5915-00-176-2548
NSN 5895-01-484-0748
NSN 6145-00-504-5221
NSN 6320-01-388-1067
NSN 2925-01-528-7333