THREADED STEEL FLANGES, WELDING.Buy NowTHREADED STEEL FLANGES, WELDING. Class 150 - 300 - 600 flanges and special fabrications.SPECSANSI CLASS 150 - 300 - 600 - 1200 Threaded Flange ANSI CLASS 150 - 300 - 600 - 1200 weldable flange Blind flange ANSI CLASS 150 - 300- 600 - 1200 Measurements: 1/2 "- 10" MASS PRODUCTIONNon-commercial measures are they manufacture upon request.