7steel, @20.625 in. Lg o/a, 1-1/4-4 modified acme @thd, rh, 16.750 in. Thd lg, 0.750 in. Neck dia, 2.438 in. @neck lg, 0.319 in. Diameter hole through neck, 0.458 in. From hole center to neck end, 0.250 in. Diameter hole through thd end, 0.312 in. From center of hole to end