Refrigeration Fittings | McMaster-Carr

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266 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.

45° Flared Fittings for Copper and Brass Tubing

No sleeve is required to assemble these fittings, which makes for a faster, more convenient installation compared to 37° flared fittings. They are also known as refrigeration and SAE fittings.

Nuts for 45° Flared Fittings
for Copper and Brass Tubing

Supported 45° Flared Fittings
for Copper and Brass Tubing

The flared end of the fitting nests inside the fitting body, providing extra support to the tubing. Fittings are also known as inverted 45° flared fittings.

Nuts for Supported 45° Flared
Fittings for Copper and Brass Tubing

Air Conditioning Hose

Use hose to charge and test your air conditioning units.

Air Conditioning Hose Sets

Each hose is a different color so you can differentiate your lines.

Nuts for High-Pressure Nipples for Compressed Gas

These nuts attach to high-pressure nipples for compressed gas so you can connect your tank to the inlet of a pressure regulator.

High-Pressure Nipples for Compressed Gas

Commonly used in high-pressure welding applications, these nipples connect your tank to the inlet of a pressure regulator. One side has a threaded pipe end and the other side has a rounded end that sits inside a threaded nut to make a threaded connection.

Check Valves for Refrigerant

These valves are often used in refrigeration and air-conditioning systems.

Threaded On/Off Valves for Refrigerant

Often used in HVAC or refrigeration systems, these valves are designed to control the flow of ammonia, nitrogen, and other harsh chemicals.