PrintCast Iron Threaded Flanges Specs/Part #s Approx. Wt. Lbs. Diameter of Flange A Thickness of Flange B (minimum) Diameter of Hub C (minimum) Length of Hub & Thd. D (minimum) Size Part Number 1.7 4.620 0.500 2.310 0.810 1 1/4" SFBTF1250 2.3 5.000 0.560 2.560 0.880 1 1/2" SFBTF150 4.0 6.000 0.620 3.060 1.000 2" SFBTF200 6.0 7.000 0.690 3.560 1.120 2 1/2" SFBTF250 7.0 7.500 0.750 4.250 1.190 3" SFBTF300 11.8 9.000 0.940 5.310 1.310 4" SFBTF400 13.2 10.000 0.940 6.440 1.440 5" SFBTF500 16.5 11.000 1.000 7.560 1.560 6" SFBTF600 26.0 13.500 1.120 9.690 1.750 8" SFBTF800 37.8 16.000 1.190 11.940 1.940 10" SFBTF1000 65.0 19.00 1.25 15.00 1.12 12" SFBTF1200