Proto J5420M 20mm 12-point 1/2 Drive Hand Socket

Product Description

The PROTO J5420M is a 20 mm, 12-point hand socket designed for professional-grade fastener work. Built on a 1/2 inch drive, this standard-length socket features a chrome-plated finish that resists corrosion and makes cleaning easier between jobs. The 12-point configuration provides more engagement positions per revolution, useful in confined spaces where swing arc is limited. At 0.21 pounds, it is lightweight without sacrificing the durability expected from a professional socket. Licensed tradespeople and maintenance technicians working on mechanical systems, industrial equipment, and structural assemblies rely on this socket for consistent, repeatable torque application.

The J5420M is suited for general mechanical maintenance, equipment assembly, and service work across residential, commercial, and light industrial settings. It is commonly used by HVAC technicians, pipefitters, millwrights, and electricians when installing or servicing equipment with metric fasteners. The 20 mm size is frequently encountered on motor mounts, flanges, conduit fittings, and structural hardware. The standard length profile works well with most 1/2 inch drive ratchets, breaker bars, and torque wrenches.

Key Features

• 20 mm socket size for metric fastener applications
• 12-point design allows more positioning options in tight spaces
• 1/2 inch drive compatible with standard ratchets, breaker bars, and torque wrenches
• Chrome-plated finish for corrosion resistance and easy wiping clean
• Standard length profile for everyday drive-tool use
• Lightweight at 0.21 pounds for reduced hand fatigue during extended use

Compatibility

Designed for use with standard 1/2 inch drive ratchets, extensions, and torque wrenches. Fits any 1/2 inch square drive tool accepting standard metric hand sockets.

Installation Notes

This socket is installed and removed by hand using a compatible 1/2 inch drive tool. Verify the fastener size before applying torque to avoid rounding. Do not use impact drivers unless the socket is rated for impact use. Inspect the socket for cracks or wear before each use and replace if damage is found.