Southco Constant Torque Hinge Symmetric Forward Torque - 3.4 N-m - Reverse Torque - Large - Stainless Steel 316 - Polished

The Southco Constant Torque Hinge Symmetric Forward Torque – 3.4 N-m with Reverse Torque in Large format is engineered for automotive applications where controlled, repeatable motion is critical. Whether you're fabricating custom engine bay components, installing aftermarket air intakes, or building billet hood or trunk lid assemblies, this hinge delivers consistent resistance in both opening and closing directions. Constant torque hinges eliminate slamming, drift, and unpredictable movement—essential when working with lightweight panels, access doors, or equipment covers where safety and precision matter.

Manufactured from stainless steel 316 with a polished finish, this symmetric hinge resists corrosion and salt spray—critical for vehicles exposed to harsh conditions or frequent washing. The 3.4 N-m torque specification provides balanced forward and reverse resistance, preventing gravity-induced sag while allowing one-handed operation without excessive force. The large form factor accommodates thicker materials and higher-load applications common in custom bodywork, race car fabrication, and heavy-duty truck modifications. The polished 316 stainless construction ensures longevity and maintains appearance in visible installations where cosmetics matter as much as function.

This hinge suits mechanics and fabricators building custom engine access panels, removable tonneau covers, hinged toolboxes, and specialty automotive enclosures. Its symmetric torque profile works equally well in horizontal or vertical orientations, making it ideal for doors, lids, and movable components where consistent feel is non-negotiable. Installation is straightforward—mount via standard fastener holes and adjust as needed for your specific application. The compact 3 x 1 x 3 inch footprint integrates into tight spaces without compromising structural integrity or aesthetics.