Proto J74278P 1/2 in Drive 11/16 in Impact Socket 6-pt

Product Description

The PROTO J74278P is a 6-point impact socket designed for heavy-duty fastener work in professional trade applications. Built from alloy steel, it accepts a 1/2 inch square drive and fits 11/16 inch hex fasteners. The overall length is 2-19/32 inches, keeping it compact enough for tight access while still providing the wall thickness needed to handle impact driver torque. This socket meets ASME B107.2 standards, confirming it is manufactured to dimensional and performance tolerances expected by professional mechanics, pipefitters, and maintenance technicians.

This socket is suited for use in industrial maintenance, mechanical contracting, plumbing, and HVAC service where fastener removal and installation under impact load is routine. The 6-point contact geometry reduces the risk of fastener rounding compared to 12-point designs, making it the preferred choice when working with worn or corroded hex hardware. The universal style designation indicates it is appropriate for a broad range of standard hex-head fasteners encountered across residential and commercial service work.

Key Features

• 1/2 inch square drive compatible with standard impact wrenches and ratchets
• 11/16 inch socket size for hex fastener engagement
• 6-point drive geometry reduces fastener rounding on worn hardware
• Alloy steel construction rated for impact tool use
• Meets ASME B107.2 dimensional and performance standard
• Compact 2-19/32 inch overall length for access in confined spaces

Compatibility

Designed as a standard 1/2 inch drive impact socket for use with 1/2 inch drive impact wrenches, air ratchets, and hand ratchets requiring a 6-point 11/16 inch hex socket.

Installation Notes

Impact sockets should only be used with impact-rated drive tools. Do not substitute chrome hand-tool sockets in impact applications, as they are not rated for the shock loads generated by pneumatic or cordless impact drivers. Inspect the socket for cracks or deformation before each use and remove from service if damage is found. Ensure the socket is fully seated on the drive anvil and fastener before applying tool torque.