Gearwrench 84578N 1/2 in Drive 20mm Impact Socket 6-point

Product Description

The GEARWRENCH 84578N is a 20mm, 6-point impact socket designed for use with 1/2 inch drive impact wrenches and ratchets. Manufactured from chromium-molybdenum steel with a black oxide finish, it is built to handle the high-torque demands of impact driving in professional shop and field environments. The off-corner loading design transfers force away from fastener edges, reducing the risk of rounding. High-visibility laser-etched markings allow quick size identification, and secondary hard-stamped markings back them up when surfaces are worn or dirty. Licensed mechanics, fleet technicians, and industrial maintenance pros are the primary users.

This socket suits residential and commercial mechanical work wherever a 1/2 inch drive impact tool is in use. Typical applications include automotive, heavy equipment, and general industrial fastener work requiring a 20mm metric hex socket. The metric sizing and ASME B107.33M compliance make it a reliable fit for standardized fastener service across a wide range of equipment types.

Key Features

• 6-point design with off-corner loading to reduce fastener rounding under high torque
• Chromium-molybdenum steel construction for impact-rated strength and durability
• Black oxide finish for corrosion resistance and glare reduction
• High-visibility laser-etched size markings for fast identification
• Secondary hard-stamped size markings provide a permanent backup reference
• Meets ASME B107.33M standards for impact socket performance

Compatibility

Designed as an OEM-style replacement and standard-fit impact socket for 1/2 inch drive impact wrenches, air ratchets, and torque wrenches requiring a 20mm 6-point metric socket.

Installation Notes

Install and remove using a 1/2 inch drive impact wrench, air ratchet, or breaker bar. Ensure the socket is fully seated on the fastener before applying torque to avoid slippage. Do not use impact sockets with non-impact hand-ratchet drives beyond their rated capacity. Inspect the socket for cracks or deformation before each use and remove from service if damage is found.