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The SMC PNEUMATICS KQ2H01-33AS is a push-to-connect tube fitting connector designed for quick, tool-free tube connections in pneumatic and fluid systems. Built from brass with a polybutylene tube collet, this fitting accepts 1/8 inch outside diameter tubing and connects to a 1/16 inch NPT threaded port. It holds a maximum working pressure of 145 psi and operates across a temperature range of 23 degrees F to 140 degrees F. Plumbers, pipefitters, and pneumatic system technicians use this fitting where fast, secure connections are required without soldering or compression tools.
This connector is suited for light-duty pneumatic lines, instrumentation tubing, and low-pressure fluid transfer applications in both residential and commercial settings. The 1/16 NPT male thread allows direct installation into standard threaded ports on valves, manifolds, cylinders, and similar components. The push-to-connect mechanism provides a reliable seal with 1/8 inch OD tubing, making it a practical choice for tight installations where fast assembly or frequent line changes are needed.
Designed as an OEM-style push-to-connect fitting for pneumatic and low-pressure fluid systems using 1/8 inch OD tubing with 1/16 inch NPT ported components.
Installation is performed by pneumatic technicians, pipefitters, or instrumentation specialists. Depressurize and isolate the line completely before removing or installing any push-to-connect fitting. Ensure tubing ends are cut cleanly and squarely for a proper seal. Verify that the receiving port thread type is NPT before installation to avoid cross-threading or leaks.
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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