This 4 threaded flange (304 Stainless Steel) is a clean match for 150# raised-face connections. Need a dependable connection point for your piping run? Raised face is the most common sealing face youÕll see for many standard industrial flange connections. Because they thread onto the pipe, they can speed up certain repairs and modifications. The job of this threaded flange is straightforward: it gives you a standard bolt-up point so your line can connect to other flanged components. 304 offers a strong balance of durability, availability, and value. From quick repairs to planned upgrades, PLYET Industrial Supply ships the flanges you need without the runaround.