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

Typically used with standard-wall and low-pressure iron and steel unthreaded pipe fittings. Also known as Schedule 40.

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

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

Typically used with thick-wall and high-pressure iron and steel unthreaded pipe fittings. Also known as Schedule 80.

Typically used with extreme-pressure iron and steel unthreaded pipe fittings. Pipe is also known as Schedule XXH .

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

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.

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.

Also known as Schedule 10 fittings, these are thin, lightweight, and corrosion resistant.

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 thick-wall and high-pressure stainless steel unthreaded pipe fittings.

Use these heavy duty forged flanges for high-pressure applications.

Use these corrosion-resistant fittings in a low-pressure pipe line.

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.

In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications.

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

Typically used with thin-wall aluminum unthreaded pipe fittings.

Typically used with standard-wall aluminum unthreaded pipe fittings.

Thick walls give these Schedule 80 fittings excellent strength.

Also known as Pressure Class 200 fittings.

Made of PVDF that’s finished to a 12 Ra smoothness, these fittings handle some of the harshest chemicals without leaching contaminants into your line. Comparable to Kynar, they handle most organic solvents that would dissolve CPVC, and chlorine or nitric acid that would weaken polypropylene.

The inside of these fittings won’t leach contaminants into your line or accumulate particles—they’re polished to an ultra-smooth 12 Ra finish, which also makes them easy to clean. Made of polypropylene, they resist organic solvents, acids, and alkalis better than CPVC fittings.

The inside of these flanges won’t leach contaminants into your line or accumulate particles—they’re polished to an ultra-smooth 12 Ra finish, which also makes them easy to clean. Made of polypropylene, they resist organic solvents, acids, and alkalis better than CPVC pipe flanges.

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

Use at pressures up to 1,500 psi.

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.

Fittings are polished to a32 Ra and under finish on the interior.

An alternative to bolt-together fittings, these handle larger tube OD sizes and have higher vacuum ratings than quick-clamp fittings. Also known as ISO-K high-vacuum fittings, the clamps have claws that grab hold of fittings with flanged ends.

Also known as CGA nuts, these are designed for low-pressure welding applications downstream of your pressure regulator. Attach them to barbed hose fittings for compressed gas to make a threaded connection to torches or pressure regulators.

Sets contain a crimping tool and a variety of CGA fittings, nuts, and ferrules so you can connect pressure regulators, torches, and other components of your welding system.

Weld these nuts to round uncoated metal tubes to attach threaded parts, such as rod ends.

The three weld points on these metric hex nuts create a secure hold on a steel surface.

You can weld these metric nuts to flat and uneven uncoated stainless steel surfaces for a strong permanent hold.

When you need a high strength-to-weight ratio and extreme corrosion resistance, choose these titanium weld nuts.

Threads float inside the retainer of these metric nuts so you can install a bolt at a slight angle to align with off-center parts.

Slim at the base, these weld nuts fit in channels and other spaces too tight for round-base weld nuts. Weld them to stainless steel surfaces to add strong, permanent threads that resist corroding from chemicals.

Install threads in channels and other tight spaces where round-base weld nuts won’t fit.

An offset barrel allows you to position threads near edges and corners.

To protect their threads from deforming, these stainless steel nuts have a projection that concentrates your weld and creates room for heat to dissipate. An offset barrel lets you position threads near the edges and corners of stainless steel sheets.

With a slim base and a short barrel, these corrosion-resistant weld nuts fit in tight spaces and in low-clearance areas.

Projections on the base concentrate the weld and create space for heat to dissipate, protecting the threads on these weld nuts from deforming. Made of 18-8 stainless steel, they withstand mild chemicals and can be used in wet and outdoor environments.

Install strong, permanent threads in sheet metal to create a 90° joint.

A smooth base provides more contact with the mating surface than weld nuts with projections.

Weld these nuts to stainless steel surfaces.

These steel nuts have a short collar to fit in low-clearance areas.