PrintSteel Threaded Flanges Specs/Part #s Approx. Wt. Lbs. Diameter of Flange A Thickness of Flange B (min.) Diameter of Hub C (min.) Length of Hub & Thd. D (Min.) Size Model 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 6.000" 0.620" 3.060" 1.000" 2" SFBTF200 6 7.000" 0.690" 3.560" 1.120" 2 1/2" SFBTF250 7 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 13.500" 1.120" 9.690" 1.750" 8" SFBTF800 37.8 16.000" 1.190" 11.940" 1.940" 10" SFBTF1000 65 19.000" 1.25" 15.00" 1.25" 12" SFBTF1200