Featuring reverse threaded external connection and standard 1 / 4inch internal / external threading , it maintains compatibility with industrial grade fittings while accidental disengagement during operate Ideal for HVAC technicians , automotive repair specialists , and enthusiasts requiring leak proof connection for pressurized systems Engineered with 32 reverse thread design and high strength alloy steel construction , this 1 / 4inch 32 R454ABC Refrigerant Brass Adapter ensures secure connection for R454ABC Split Systems while resisting in demanding environment Perfect for refrigerant line installations , pneumatic tool setups , and industrial equipment maintenance where reverse threaded compatibility is critical The precise machined steel body withstands repeated torques applications , making it a durability solution for professional workshops and heavy duty home garage projects, Manufacturer: GMBYLBY