Proto J5210 Hand Socket 5/16 in 12-point 3/8 Drive

Product Description

The PROTO J5210 is a 12-point hand socket designed for general mechanical and trade service work. Built from alloy steel with a chrome-plated finish, this 5/16-inch socket accepts a 3/8-inch drive and delivers a standard-length profile at 1-3/32 inches overall. The 12-point design allows engagement in tighter spaces where swing arc is limited, making it a practical choice for HVAC equipment panels, electrical enclosures, plumbing fixture hardware, and general fastener work. Licensed tradespeople and experienced DIYers alike rely on sockets of this type for both handheld and ratchet-driven applications.

This socket fits typical residential and light commercial service scenarios where 5/16-inch fasteners appear on equipment covers, access panels, and mechanical assemblies. The standard length suits most open-access installations. The chrome finish resists corrosion in environments where moisture or mild chemical exposure is common, including outdoor condenser units, mechanical rooms, and pool equipment enclosures.

Key Features

• 5/16-inch socket size with 12-point configuration for wider engagement angles
• 3/8-inch drive compatible with standard ratchets and extensions
• Alloy steel construction for durability under torque
• Chrome-plated finish for corrosion resistance
• Standard length at 1-3/32 inches overall
• Meets AS4984A and ASME B107.110-2012 standards

Compatibility

Designed for use with standard 3/8-inch drive ratchets, extensions, and torque wrenches. Compatible with 5/16-inch fasteners in trade service applications across HVAC, plumbing, electrical, and pool equipment maintenance.

Installation Notes

Install and remove fasteners only within the rated drive and socket size to avoid rounding hardware. Inspect the socket for cracks or wear before use, particularly on high-cycle service work. Do not use hand sockets with impact drivers unless the socket is impact-rated. Store in a dry location to preserve the chrome finish.