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The MIDLAND INDUSTRIES 30314 is a brass adapter fitting that connects a 3/8-inch push-on hose barb to a 3/8-inch female inverted flare. It serves as a transition point between flexible hose assemblies and inverted flare line connections, making it a practical component in fuel, refrigerant, and hydraulic line repairs. The fitting features a 5/8-18 thread and a 3/4-inch hex for standard wrench engagement. Rated to 150 psi maximum operating pressure, it is suited for low-to-medium pressure plumbing and fluid transfer applications. Plumbers, HVAC technicians, and fleet service professionals are the primary installers of this type of adapter.
This adapter is used where a push-on hose barb connection must transition to a female inverted flare port. Common install scenarios include automotive fuel line repairs, small-diameter refrigerant service lines, and general fluid transfer systems where both connection types are present in the same assembly. Its compact length of 1.35 inches makes it appropriate for tight-clearance installations. The brass construction resists corrosion and is compatible with a range of fuel, oil, and refrigerant media typically found in these systems.
Designed as an OEM-style replacement or service fitting for systems requiring a 3/8-inch push-on hose barb to 3/8-inch female inverted flare transition with a 5/8-18 thread standard.
Installation of this fitting should be performed by a qualified plumber, HVAC technician, or fleet service professional. Depressurize and drain the line completely before disassembly or installation. Use a backup wrench on the mating component when tightening to avoid stressing adjacent fittings or tubing. Verify thread engagement and check for leaks at operating pressure before returning the system to service.
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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