Butt-weld fittings allow for a smooth, flush connection that provides maximum flow.

Also known as I-line fittings, these fittings have a male adapter that interlocks with a female adapter for more support than standard quick-clamp fittings.

Also known as KF, QF, and NW fittings, these fittings are for high-vacuum applications, such as vacuum coating and heat treating, leak testing, and analyzing gases.

Polished to at least a 15 Ra finish on the inside, these fittings have an ultra-smooth interior surface that helps prevent contamination. They are also known as ultra-high-purity fittings.

For high-vacuum systems with tube sizes too large for quick-clamp (KF) fittings, choose these bolt-together fittings.

Create access points in ultra-high-vacuum lines or chambers by bolting two same-size flanges together with a copper gasket between them. The flanges’ sharp edges dig into the copper gasket and form an extremely tight seal, which means they handle higher vacuum pressures than other high-vacuum fittings with rubber gaskets.

With thicker, stronger walls than our standard-wall butt-weld pipe fittings, these fittings stand up to your high strength applications.

Forged for extra strength, these heavy duty unthreaded flanges can withstand high-pressure applications.

Even in temperatures as low as -46°, these A350 LF2 steel flanges won’t become brittle, so they absorb impact better than other low-pressure steel flanges.

Bolt two flanges of the same size together with a gasket to create an access point in a pipe line.

The strongest steel fittings we offer, these can withstand extreme-pressure applications.

Also known as Schedule 40, this steel pipe is designed for low-pressure applications.

These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.

Butt-weld fittings allow for a smooth, flush connection that provides maximum flow.

Typically used with standard-wall and low-pressure stainless steel unthreaded pipe fittings.

Typically used with thin-wall stainless steel unthreaded pipe fittings.

Typically used with extreme-pressure stainless steel unthreaded pipe fittings.

Socket-connect fittings are easier to weld than butt-weld fittings because the fitting doesn't need to align perfectly to the pipe. Slip the pipe into the socket and weld.

Typically used with low-pressure stainless steel threaded pipe fittings.

Unlike other stainless steel fittings, these are made in the U.S.A. for superior quality. As another marker of quality, they come with a certificate with a traceable lot number and test report that guarantees material composition.

Also known as Schedule 40 fittings, these have thicker walls than our thin-wall aluminum unthreaded pipe fittings.

Use these unthreaded flanges in low-pressure applications. Also known as Pressure Class 125 flanges.

Typically used with thin-wall aluminum unthreaded pipe fittings.

Typically used with thick-wall aluminum unthreaded pipe fittings.

Typically used with brass and bronze unthreaded pipe fittings.