Proto J77278P Impact Socket 3/8 in Drive 11/16 in 6-point

Product Description

The PROTO J77278P is a 6-point impact socket designed for high-torque fastening applications where a standard chrome socket would fail. Built from alloy steel, it accepts a 3/8 inch drive and fits 11/16 inch hex fasteners. The universal style and 2 inch overall length make it a practical choice for tight quarters and standard impact wrench work. It meets ASME B107.2 specifications, confirming dimensional and performance compliance for professional use. Licensed mechanics, industrial maintenance technicians, and trade professionals working in HVAC, plumbing, and electrical rough-in rely on impact-rated sockets to handle repeated torque cycles without cracking or rounding.

This socket suits residential and light commercial service work where 3/8 inch drive impact wrenches are the tool of choice. Common applications include equipment mounting hardware, panel fasteners, pipe flange bolts, and conduit fittings that require a 11/16 inch hex drive. The 6-point contact pattern distributes load evenly across fastener flats, reducing the risk of rounding under impact loads. It is equally useful on an impact wrench or a standard ratchet when manual torque control is preferred.

Key Features

• Alloy steel construction rated for repeated impact wrench use
• 6-point socket geometry reduces fastener rounding under load
• Meets ASME B107.2 dimensional and performance standard
• 3/8 inch drive accepts standard impact and ratchet drive tools
• Compact 2 inch overall length suits confined work areas
• Universal style compatible with both impact and hand-ratchet use

Compatibility

Designed for use with 3/8 inch drive impact wrenches and ratchets; fits 11/16 inch hex fasteners in standard residential and commercial service applications.

Installation Notes

Install and remove this socket using a 3/8 inch drive impact wrench or ratchet. Ensure the socket is fully seated on the fastener before applying torque to prevent slipping and fastener damage. Inspect the socket for cracks or wear before each use and retire any socket showing visible deformation. Follow applicable safety practices and equipment manufacturer torque guidelines when working on structural or pressure-bearing fasteners.