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The NORGREN 121250418 is a straight push-to-connect tube fitting adapter designed to connect 1/4-inch OD tubing to a 1/8-inch male BSPT threaded port. Constructed from nickel-plated brass, this adapter provides a corrosion-resistant, leak-resistant connection suited for pneumatic lines and fluid transfer systems. It supports a maximum working pressure of 260 psi and handles temperatures from -4 degrees F to 176 degrees F. The push-to-connect end accepts tubing without tools, while the male BSPT thread engages standard British Standard Pipe Tapered ports. HVAC technicians, pneumatic system installers, and industrial maintenance professionals commonly install this fitting in air preparation and control assemblies.
This adapter is appropriate for use in compressed air systems, pneumatic control circuits, and fluid handling lines where 1/4-inch OD tubing must terminate at a 1/8-inch BSPT male port. Its compact straight profile suits tight panel or manifold installations. The 0.91-inch overall length keeps the fitting footprint minimal in space-constrained enclosures or valve bodies. It is also rated for vacuum service at up to 29.5 inches Hg, making it suitable for both positive-pressure and vacuum pneumatic circuits.
Designed as a direct-fit push-to-connect adapter for pneumatic systems and fluid handling assemblies using 1/4-inch OD tubing with 1/8-inch male BSPT threaded ports.
Installation is performed by pneumatic system technicians or HVAC service professionals. Depressurize and isolate the circuit completely before removing or installing any fittings. Insert tubing fully into the push-to-connect end until it seats; verify seating by gently pulling back on the tube before re-pressurizing. Apply appropriate thread sealant to the BSPT male threads per manufacturer and job-site requirements before threading into the receiving port.
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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