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The MIDLAND INDUSTRIES 20937P is a push-in to female flare adapter fitting designed for making quick, tool-free tube connections in pneumatic and fluid transfer systems. Constructed from gray acetal plastic, it accepts a 3/8-inch OD tube on the push-in end and connects to a 1/4-inch female flared port via a 7/16-20 thread on the other end. Rated to 170 psi with a service temperature range of 34 to 150 degrees F, this fitting suits light-duty compressed air, water, and compatible fluid lines where a transition between push-in tube and flared female fittings is required. HVAC technicians, plumbers, and refrigeration techs reach for this fitting when routing small-diameter tubing to flare-threaded ports.
This adapter is suited for residential and light commercial applications where 3/8-inch OD tubing must terminate at a 1/4-inch female flare connection. Common install scenarios include pneumatic control lines, condensate or water supply runs, and low-pressure fluid systems. Its compact profile - under 1.25 inches in height - allows installation in tight spaces without special tooling on the push-in side. The acetal construction resists moisture and mild chemical exposure common in HVAC and plumbing environments.
Designed as an OEM-style replacement or new-installation fitting for systems using 3/8-inch OD push-in tubing and 1/4-inch female flare ports in low-to-medium pressure pneumatic or fluid transfer applications.
Installation is performed by licensed HVAC technicians, plumbers, or qualified refrigeration mechanics. Shut off and depressurize the system completely before removing or installing any fittings. Ensure the 3/8-inch OD tube end is cut clean and square with no burrs before inserting into the push-in port to ensure a proper seal. Thread the female flare end onto its mating port by hand first, then tighten to snug fit - do not over-torque acetal fittings, as excess force can crack the body.
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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