Proto J5279AM 16 Mm 12-point 3/8 Drive Hand Socket

Product Description

The PROTO J5279AM is a 16 mm, 12-point hand socket designed for use with a 3/8 inch drive ratchet or breaker bar. Constructed from alloy steel with a chrome-plated finish, it delivers durability in demanding shop and field environments. The 12-point geometry provides more engagement positions than a 6-point socket, making it well-suited for confined spaces where swing arc is limited. Overall length is 1-57/64 inches. This socket meets ASME B107.5M standards and is a standard addition to any professional mechanic or maintenance technician tool set.

This socket is intended for general mechanical fastener work in automotive, industrial, and equipment maintenance applications. It fits standard 3/8 inch drive tools including ratchets, extensions, and torque wrenches. The 16 mm size is common in metric fastener applications across passenger vehicles, light trucks, and machinery. Installation is performed by hand tool technicians and mechanics working on both field service and bench repair tasks.

Key Features

• 16 mm socket size for metric fastener applications
• 12-point design allows engagement at more positions in tight access areas
• 3/8 inch drive compatible with standard ratchets, extensions, and torque wrenches
• Alloy steel construction with chrome-plated finish for corrosion resistance
• Meets ASME B107.5M standards for hand socket tools
• Overall length of 1-57/64 inches for compact fitment

Compatibility

Designed for use with standard 3/8 inch drive hand tools including ratchets, flex handles, breaker bars, and extensions used in metric fastener service.

Installation Notes

This socket is installed and used by mechanics and maintenance technicians using standard 3/8 inch drive hand tools. Ensure the socket is fully seated on the fastener head before applying torque to avoid rounding. Inspect the socket for cracks or wear before each use. Note that this socket is not tether capable and should not be used in elevated or overhead work zones where dropped tool protocols require tethering.