Proto J5210HS 5/16 Inch 6-point Hand Socket 3/8 Drive

Product Description

The PROTO J5210HS is a 5/16 inch, 6-point hand socket built for professional fastener work in tight or shallow spaces. Machined from alloy steel with a chrome finish, this socket fits a 3/8 inch drive and measures 49/64 inches in overall length. The low-profile design reduces overall height, making it well-suited for confined fastener locations where a standard-depth socket will not clear surrounding components. The chrome plating resists corrosion and makes the socket easy to clean after use in oily or dirty environments. Tradespeople across mechanical, HVAC, plumbing, and electrical trades rely on hand sockets like the J5210HS for routine service calls and panel work.

This socket is appropriate for both residential and light commercial service applications. Its 3/8 inch drive accepts any standard 3/8 inch drive ratchet, breaker bar, or torque wrench. The low-profile length is especially useful when working inside equipment enclosures, electrical panels, and mechanical assemblies where vertical clearance is limited. The 6-point contact geometry distributes torque evenly across fastener flats, reducing the risk of rounding worn or corroded hex fasteners during removal.

Key Features

• 5/16 inch socket size fits common hex fasteners found across HVAC, plumbing, and electrical equipment
• 6-point contact design reduces fastener rounding under high torque
• 3/8 inch drive is compatible with standard ratchets, extensions, and torque wrenches
• Low-profile overall length of 49/64 inches suits confined and shallow fastener locations
• Alloy steel construction provides durability for repeated professional use
• Chrome finish resists corrosion and simplifies cleanup in oily work environments

Compatibility

Designed for use with any standard 3/8 inch drive ratchet, breaker bar, or extension. Fits 5/16 inch hex fasteners. No tether capability; not rated for tethered tool programs.

Installation Notes

Install and remove fasteners with a properly rated 3/8 inch drive tool. Verify the socket is fully seated on the fastener before applying torque to prevent slipping or rounding. When working inside energized enclosures, de-energize and lock out the equipment per applicable NFPA 70E procedures before use. Inspect the socket for cracks or wear before each use and replace if the drive square or socket bore shows visible damage.