Yor-Lok Air Hose | McMaster-Carr

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1,391 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.

Yor-Lok Fittings for Stainless Steel Tubing

Use these fittings at pressures up to 9,700 psi. Also known as instrumentation fittings, they are made to tight tolerances for use in high-precision applications. They are compatible with Swagelok®, Let-Lok, and Parker A-Lok fittings.

Cleaned and Bagged Yor-Lok
Fittings for Stainless Steel Tubing

For applications that require an extra level of cleanliness, these fittings are individually bagged to prevent contamination.

Extreme-Pressure Yor-Lok
Fittings for Stainless Steel Tubing

These fittings have the highest pressure rating of all the Yor-Lok tube fittings we offer.

Quick-Clamp High-Vacuum
Fittings for Stainless Steel Tubing

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.

Through-Wall Fittings for High-Vacuum Chambers

Transfer liquids and gasses into high-vacuum chambers with these assembled fittings, also known as feedthroughs.

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.

Yor-Lok Fittings for Copper Tubing

Acid-Resistant Yor-Lok
Fittings for Nickel Alloy Tubing

These Monel fittings have the corrosion resistance to handle hydrofluoric and sulfuric acid. Also known as instrumentation fittings, they include a nut with two sleeves.

Ultra-Corrosion-Resistant Yor-Lok
Fittings for Nickel Alloy Tubing

With the best corrosion resistance of any metal fitting we offer, these Hastelloy fittings will stand up to aggressive chemicals and are resistant to pitting and stress cracking. Also known as instrumentation fittings, they include a nut with two sleeves.