Proto J5420MN 20mm 12-point 1/2 Drive Hand Socket

Product Description

The PROTO J5420MN is a 20 mm, 12-point hand socket designed for use with a 1/2 inch drive ratchet or breaker bar. Built from chrome-plated steel, it delivers the corrosion resistance and clean finish that professionals expect on a bench or field tool. At a standard length of 1.75 inches overall, it fits into most engine bay and mechanical service applications without the reach of a deep socket. The 12-point design engages fasteners at twice the indexing positions of a 6-point socket, making it easier to set the tool in tight quarters. It meets AS4984A, ASME B107.110-2012, and SAE AS955 standards and carries a lifetime warranty.

This socket is suited for general mechanical service work in automotive, fleet, industrial, and equipment maintenance settings. Licensed mechanics, millwrights, and maintenance technicians reach for standard-length sockets like the J5420MN when working on engine components, suspension hardware, and structural fasteners where a 20 mm metric fastener is specified. It is not tether capable, making it most appropriate for ground-level or bench work rather than overhead applications where dropped-tool protocols are required.

Key Features

• 20 mm socket size fits common metric fasteners on automotive and industrial equipment
• 12-point design provides more engagement positions in restricted access areas
• 1/2 inch drive compatible with standard ratchets, breaker bars, and torque wrenches
• Chrome-plated steel construction resists corrosion and wipes clean easily
• Standard length at 1.75 inches overall suits the majority of general-service applications
• Meets AS4984A, ASME B107.110-2012, and SAE AS955 standards with a lifetime warranty

Compatibility

Designed as an OEM-style hand socket for use with any 1/2 inch drive ratchet, breaker bar, extension, or torque wrench following standard drive-tool conventions.

Installation Notes

Install and remove this socket by a qualified mechanic or maintenance technician using standard 1/2 inch drive hand tools. Always confirm the fastener size before applying torque to avoid rounding the fastener head. This socket is not tether capable and should not be used overhead in environments where a dropped-tool program is enforced. Inspect the socket for cracks or deformation before each use and remove it from service if damage is found.