Proto J5438M 38mm 12-point 1/2in Drive Hand Socket

Product Description

The PROTO J5438M is a 38 mm, 12-point hand socket designed for 1/2 inch drive ratchets and breaker bars. Built from alloy steel with a chrome finish, it measures 2.25 inches in overall length and falls into the standard-length category. The 12-point geometry allows engagement in tighter spaces where a 6-point socket may not seat cleanly. This socket meets ASME B107.5M standards and carries a limited lifetime warranty. It is a practical, durable tool for licensed mechanics, HVAC techs, plumbers, and electricians who work with larger fasteners in tight access areas.

The J5438M is suited for industrial maintenance, mechanical assembly, and trade service work where a large-diameter metric fastener is common. The 38 mm size appears frequently in commercial HVAC equipment, large pump assemblies, and industrial piping systems. It is intended for hand-drive use only and is not tether capable, making it best suited for ground-level or bench work where dropped-tool protocols do not require tethering.

Key Features

• 38 mm socket size with 12-point design for flexible fastener engagement
• 1/2 inch drive compatible with standard ratchets, breaker bars, and torque wrenches
• Alloy steel construction with chrome finish for corrosion resistance and durability
• Standard length at 2.25 inches overall for general-access applications
• Meets ASME B107.5M dimensional and performance standards
• Limited lifetime warranty from the manufacturer

Compatibility

Designed for use with any 1/2 inch drive ratchet, torque wrench, or breaker bar accepting standard square-drive sockets. Not tether capable; not intended for overhead or elevated drop-hazard environments.

Installation Notes

This socket is installed by a mechanic or trade professional using a 1/2 inch drive handle. Ensure the fastener and socket are fully seated before applying torque to avoid rounding. Do not use impact drivers with this hand socket unless the tool is rated for impact use. Follow applicable torque specifications from the equipment manufacturer when tightening critical fasteners.