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The SMC PNEUMATICS KQ2P-12 is a push-to-connect plug fitting designed to seal and terminate pneumatic or fluid tubing lines without tools. Constructed from brass with a polybutylene body, it accepts a 12mm outside diameter tube and holds a maximum working pressure of 150 psi. The fitting measures 45.50mm in overall length. Installation requires only inserting the tube until it seats - no threading, no ferrules, no compression sleeves. This type of fitting is used by pneumatic system technicians, industrial maintenance professionals, and plumbing contractors to cap off active or unused tube ports quickly and securely.
The KQ2P-12 suits pneumatic control lines, instrumentation tubing, and low-pressure fluid distribution systems where a clean, reliable port termination is needed. Its push-to-connect design makes it well suited for panel assembly work, manifold installations, and anywhere a fast, repeatable tube seal is required. The white color aids visual identification in multi-line installations.
Designed as an OEM-style replacement or service fitting for pneumatic and fluid tubing systems using 12mm outside diameter polybutylene or compatible push-to-connect tubing.
This fitting is typically installed by pneumatic system technicians or licensed plumbers depending on the application. Before installing or removing any fitting, depressurize the line completely and verify pressure has dropped to zero. Insert the tube straight and fully into the fitting body until it clicks into the collet. To release the tube, depress the collet collar evenly before pulling the tube free - forcing removal without depressing the collet will damage the sealing components.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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