Southco Constant Torque Hinge, Symmetric (Part No. ST-10A-80SA-50) is engineered for reliable performance in professional fastening, access hardware and assembly applications. Its listed specification includes Zinc Alloy, Black Paint. This hinge is designed to provide controlled movement and dependable support for doors, lids, panels and equipment enclosures. As part of the Southco product range, it reflects the brand's established focus on consistent quality and application-led engineering. Its engineering-focused construction helps deliver smooth operation, durable performance and reliable access over repeated use.