The JB-3957 is a junction box designed for electrical enclosure and component mounting applications. It is constructed from 16 gauge (1.5 mm) steel with a smooth gray powdercoat finish, providing corrosion resistance and durability. The unit features a removable cover secured with #10-32 machine screws (zinc-plated steel, pan head with slotted/square combination drive), and includes a grounding emboss point for electrical safety. Key dimensions include an overall height of 8.00 inches (203.2 mm), width of 4.00 inches (101.6 mm), and depth of 5.00 inches (127 mm), with a wall thickness of 0.281 inches (7.14 mm). This junction box is commonly used in industrial control systems, electrical distribution, and equipment mounting where a compact, durable enclosure with grounding capability is required.