Proto J5220M 20mm 12-point 3/8 Drive Hand Socket

Product Description

The PROTO J5220M is a 20 mm, 12-point hand socket built for professional-grade fastener work. It features a 3/8 inch drive and a standard-length body measuring 1-3/16 inches overall. Constructed from alloy steel with a chrome-plated finish, the J5220M delivers corrosion resistance and long service life in demanding shop and field environments. It meets ASME B107.5 standards for hand socket tools, making it a reliable choice for mechanics, maintenance technicians, and industrial trades who require consistent torque transfer and dimensional accuracy on metric fasteners.

This socket is suited for residential, commercial, and industrial maintenance applications where 20 mm metric fasteners are common. It is appropriate for use with 3/8 inch drive ratchets, extensions, and torque wrenches in standard-clearance environments. The 12-point geometry allows engagement at 30-degree increments, providing flexibility in tight or restricted work areas. It is not tether capable and is intended for conventional hand-tool use in non-tethered work environments.

Key Features

• 20 mm socket size fits standard metric fasteners
• 12-point design allows 30-degree ratchet engagement increments
• 3/8 inch drive compatible with standard ratchets, extensions, and torque wrenches
• Alloy steel construction for high strength and wear resistance
• Chrome-plated finish provides corrosion protection and easy cleaning
• Meets ASME B107.5 standards for hand socket tools

Compatibility

Designed for use with 3/8 inch drive hand-tool systems. Compatible with standard 3/8 inch drive ratchets, breaker bars, extensions, and torque wrenches accepting hand sockets per ASME B107.5.

Installation Notes

Install and remove using a 3/8 inch drive ratchet or torque wrench. Ensure the socket is fully seated on the fastener before applying torque to prevent rounding. Do not use impact drivers or air tools with this hand socket unless the tool is rated for impact use. Inspect the socket for cracks or wear before each use and retire any damaged sockets from service.