0.390" hole diameter two holes drilled thru 0.125 in. min 0.129 in. max dia 180 deg apart one hole located 0.469 in. from washer centerline one 0.659 in. from washer center line cadmium surface treated
2b thread class right-hand 12 thread quantity per inch 3 lugs on top of nut equally spaced, 0.625 in. wide by 0.380-0.440 in. high anodize surface treated