Also known as coolant-line mold couplings, these couplings are often used to install and remove coolant lines in molding and die casting applications. A complete coupling consists of a plug and a socket (both sold separately) that connect and disconnect quickly. Use them when you need frequent access to a line. All of the quick-disconnect coolant plugs are compatible with any of the quick-disconnect coolant sockets of the same coupling size, regardless of the pipe size or barbed hose ID.

Open-flow plugs and sockets do not have a shut-off valve, so the couplings allow for maximum flow. Sockets with a shut-off have a valve that stops the flow of coolant when the coupling is separated.

Plugs are also known as nipples.

Sockets are sleeve-lock style. To connect, slide back the sleeve on the socket, insert the plug, and release the sleeve. To disconnect, slide back the sleeve and pull out the plug.

Sockets with a barbed end insert into plastic or rubber hose and secure with a clamp.

Zinc-plated steel plugs have fair corrosion resistance and are stronger and more durable than brass. Brass plugs and sockets have better corrosion resistance than zinc-plated steel, and are softer, so they’re easier to thread together.

NPTF (Dryseal) threads are compatible with NPT threads. NPSM (National Pipe Straight Mechanical) female threads are compatible with male NPT and NPTF threads.

Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size.

Warning: For open-flow plugs and sockets, stop the flow of coolant before you disconnect the line.

For technical drawings and 3-D models, click on a part number.