Proto J5344 Deep Hand Socket 1-3/8 in 12-point 1/2 in Drive

Product Description

The PROTO J5344 is a deep hand socket designed for professional fastener work requiring extended reach and high torque capacity. Built from alloy steel with a chrome-plated finish, this 12-point socket accepts a 1/2 inch drive and fits a 1-3/8 inch fastener. The deep-length design at 3.5 inches overall allows it to seat fully on recessed or stud-mounted nuts that a standard-depth socket cannot reach. It meets AS4984A, ASME B107.110-2012, and SAE AS954G standards, making it appropriate for both general mechanical work and applications where specification compliance is required. Mechanics, millwrights, and industrial maintenance technicians are the primary users.

This socket is suited for automotive, heavy equipment, and industrial maintenance applications where 1-3/8 inch fasteners are common. The deep-length profile is especially useful on wheel studs, long bolt assemblies, and recessed hardware found in drivetrain, suspension, and mechanical equipment service. The 12-point geometry provides more engagement positions than a 6-point socket, which is advantageous in tight quarters where full swing of the ratchet is not possible. The chrome finish aids in cleaning and corrosion resistance in shop environments.

Key Features

• 1-3/8 inch socket size fits standard hex fasteners of that dimension
• 12-point design allows more ratchet engagement positions in confined spaces
• Deep length at 3.5 inches overall provides reach on recessed and stud-mounted fasteners
• Alloy steel construction handles high-torque hand tool applications
• Chrome-plated finish resists corrosion and simplifies cleaning
• Complies with AS4984A, ASME B107.110-2012, and SAE AS954G standards

Compatibility

Designed for use with 1/2 inch drive ratchets, breaker bars, and torque wrenches. Fits 1-3/8 inch 12-point fasteners in automotive, industrial, and heavy equipment service applications.

Installation Notes

This socket is installed and removed by hand tool technicians using a 1/2 inch drive ratchet or torque wrench. Always ensure the fastener is fully seated in the socket before applying torque to prevent rounding. Power down or de-energize any associated systems before loosening or tightening fasteners on live mechanical assemblies. This socket is not tether capable and should not be used in overhead or elevated work zones where dropped-tool hazards apply.