Proto J7420M Impact Socket 1/2 in Drive 20mm 6-point

Product Description

The PROTO J7420M is a 6-point impact socket designed for heavy-duty fastener work in industrial, mechanical, and trade applications. Built for use with 1/2 inch drive impact wrenches and ratchets, this socket accepts 20mm hex fasteners and measures 1-39/64 inches overall length. The 6-point contact geometry distributes torque evenly across fastener flats, reducing the risk of rounding under high-torque impact loads. Licensed tradespeople in automotive, mechanical contracting, and industrial maintenance rely on impact sockets like this one for reliable, repeatable performance on bolts and nuts that resist hand-tool removal.

This socket is suited for residential and commercial mechanical work, automotive service, equipment repair, and general industrial maintenance where 1/2 inch drive impact tools are standard. The 20mm size covers a wide range of metric fasteners commonly found on vehicles, HVAC equipment mounting hardware, pipe flanges, and structural assemblies. Its compact overall length of 1-39/64 inches makes it workable in moderate-clearance situations without sacrificing drive depth.

Key Features

• 1/2 inch drive compatible with standard impact wrenches and ratchets
• 20mm socket size fits common metric fasteners across automotive and industrial equipment
• 6-point hex drive design maximizes contact on fastener flats and reduces rounding under impact
• 1-39/64 inch overall length suits moderate-clearance fastener access
• Single-piece construction rated for impact tool use

Compatibility

Designed as an OEM-style impact socket for use with 1/2 inch drive impact wrenches, air ratchets, and manual ratchets requiring a 20mm 6-point metric socket.

Installation Notes

Impact sockets should only be used with impact-rated drive tools. Always confirm the socket is fully seated on the fastener before applying torque. Inspect the socket for cracks or deformation before each use and remove from service if damage is found. De-energize or lock out equipment before accessing fasteners on powered machinery per applicable safety codes.