Zinc Plated Unions | McMaster-Carr

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1,152 Products

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Compact Extreme-Pressure
Steel Threaded Pipe Fittings

These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces.

Low-Pressure Press-Connect
Steel Unthreaded Pipe Fittings

Crimp these fittings onto steel pipe to form a tightly sealed connection that’s faster than threading or welding and doesn’t require heat.

Tube Fittings for Steel Tubing

Compression Fittings for Steel Tubing

A single sleeve (ferrule) bites into tubing as you tighten the nut, creating a strong seal.

High-Pressure Compression Fittings for Steel Tubing

Thicker walls make these fittings—sometimes called flareless or bite fittings—withstand about twice as much pressure as standard compression fittings, so they’re good for hydraulic power applications.

Vibration-Resistant Compression
Fittings for Steel Tubing

37° Flared Fittings for Steel Tubing

Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on steel tubing that is flared to 37°.

Tight-Space 37° Flared Fittings for Steel Tubing

The external hex bolt on these fittings allows for easy installation in cramped spaces.

30° Flared Fittings for Steel Tubing

Also known as JIS (Japanese Industrial Standard) fittings.

Yor-Lok Fittings for Steel Tubing

These fittings have two sleeves for extra gripping power. They bite into steel tubing as you tighten the nut to form a strong seal.

O-Ring Face Seal Fittings for Steel Tubing

A tube adapter sits flush against the flat face of the fitting so you can slide the steel tubing and fitting sideways to disconnect in cramped spaces. Also known as zero-clearance fittings.

O-Ring Face Seal Tube Adapters for Steel Tubing

Connectors for Medium-Wall (IMC) and Thick-Wall (Rigid) Steel Conduit

Connectors for Medium-Wall (IMC)
and Thick-Wall (Rigid) Steel Conduit

Join pieces of conduit.

Grease Fitting Adapters

When the size or thread type of a fitting doesn't match an existing opening, use these adapters to make the connection.

Swivel-Shaft Rod Ends

With a ball joint at the top of the shank, these rod ends pivot in the middle of the body instead of in the eyelet. Use them for linear push applications that require movement along the length of the connecting rod.

Lubrication-Free Swivel Joints

A slippery PTFE liner reduces wear and eliminates the need for lubrication.

Ball Joint Linkages

Internally Threaded Inline Ball Joint Linkages

Use these linkages to create inline pivoting connections. They have internal threads on one end and external threads on the other.

Lubrication-Free Ball Joint Linkages

A slippery PTFE liner reduces wear and eliminates the need for lubrication.

Internally Threaded
Lubrication-Free Ball Joint Linkages

These internally threaded linkages have a slippery PTFE liner that reduces wear and eliminates the need for lubrication.

Ball Joint Linkages

Able to stand up to frequent use, these linkages offer excellent wear resistance. They consist of ball joint rod ends with a ball stud attached to simplify mounting.

Internally Threaded Ball Joint Linkages

These linkages offer excellent wear resistance. They consist of internally threaded ball joint rod ends with a ball stud attached to simplify mounting.

Internally Threaded
Oil-Embedded Ball Joint Linkages

An oil-embedded bronze insert slowly releases lubricant to the rod end.

Internally Threaded Ball Joint
Linkages with Grease Fitting

Along with excellent wear resistance, these linkages have a grease fitting for easy lubrication. An internally threaded rod end connects to threaded rods, studs, and other parts with male threads.

Ball Joint Linkages with Grease Fitting

Along with excellent wear resistance, these linkages have a grease fitting for easy lubrication.

Oil-Embedded Ball Joint Linkages

An oil-embedded bronze insert slowly releases lubricant throughout the life of the joint.

Bent-Swivel Ball Joint Linkages

Use these bent linkages for light duty applications.

Inline Ball Joint Linkages

Use these externally threaded linkages to create inline pivoting connections.

Quick-Install Ball Joint Linkages

A spring-loaded sleeve allows for rapid assembly and disassembly. These ball joint linkages are made of steel.