Coolant Connectors | McMaster-Carr

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Coolant Supply Connector

Coolant Supply Connector On/Off Valve

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Hose Connector On/Off Valve

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882 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.

1/4" Loc-Line Coolant Hose

Build a custom 1/4" system to deliver coolant, cutting oil, water, or air in any direction.

1/4" Loc-Line Coolant Hose Kits

Kits contain lengths of hose, nozzles, valves, and caps.

1/2" Loc-Line Coolant Hose

Build a custom 1/2" system to deliver coolant, cutting oil, water, or air in any direction.

3/4" Loc-Line Coolant Hose

Build a custom 3/4" system to deliver coolant, cutting oil, water, or air in any direction.

1/4" Snap-Loc Coolant Hose Kits

Kit contains lengths of hose, nozzles, connectors, and assembly pliers.

1/4" Snap-Loc Coolant Hose

3/4" Snap-Loc Coolant Hose

1/2" Snap-Loc Coolant Hose

1/4" Acid-Resistant Loc-Line Coolant Hose

1/2" Acid-Resistant Loc-Line Coolant Hose

Tools for Loc-Line Coolant Hose

Use with Loc-Line hose to assemble and disassemble components.

Tools for Snap-Loc Coolant Hose

Use with Snap-Loc hose to assemble and disassemble components.

Bend-and-Stay Coolant Hose

This hose is made of steel.

Pipe, Tubing, Hose, and Fittings

Quick-Disconnect Hose Couplings for Coolant

Couplings consist of a plug and a socket that connect and disconnect quickly. Use them if you need frequent access to a line. They are designed for coolant applications up to 200 psi. Also known as coolant-line mold couplings.

Beaded Hose Fittings for Coolant

A single rounded bead grips onto hose just like a barb, but has no sharp edges that could cut or damage soft hose. Slide the beaded end into hose and secure with a clamp. Use in coolant applications up to 300 psi.

Minimal-Spill Quick-Disconnect
Hose Couplings for Coolant

Reduce the risk of spills near electronics when connecting and disconnecting liquid cooling lines. Also known as double shut-off couplings, these couplings have a shut-off valve on both sides that stops the flow of coolant if they’re separated.

Barbed Hose Fittings for Coolant

Designed for coolant applications up to 200 psi, these fittings have a standard barbed end that slides into hose and secures with a clamp.

Screw-On Hose Fittings for D.O.T. Hose

Create or repair D.O.T. hose assemblies in the field with just a wrench and a vise, no crimper required.

High-Temperature Coolant Hose Elbows

Move coolant around tight turns in crowded spaces. Made of silicone, these elbows withstand high temperatures up to 350° F.

Compression Fittings for Plastic Tubing—Chemicals

Fittings have a sleeve that bites into tubing as you tighten the nut to form a seal in applications up to 120 psi. Also known as flareless fittings.

Barbed Fittings for Plastic and
Rubber Tubing—Chemicals

Fittings have a barb that grips onto tubing. Use in applications up to 120 psi.

37° Flared Fittings for Aluminum Tubing

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