Proto J10038ML Impact Socket 1 in Drive 38mm 6-point

Product Description

The PROTO J10038ML is a heavy-duty impact socket designed for high-torque fastening applications in professional mechanical, industrial, and maintenance environments. Built from alloy steel, it accepts a 1-inch square drive and fits 38mm hex fasteners with a 6-point contact profile. The 4-inch overall length (OAL) provides the reach needed in tight or deep access situations. Licensed HVAC technicians, millwrights, heavy equipment mechanics, and industrial maintenance professionals rely on this type of impact-rated socket when working with large-format fasteners on compressors, flanges, drive shafts, and structural components.

This socket is suited for residential and commercial mechanical work where a 1-inch drive impact wrench is used. Typical applications include equipment installation, heavy machinery maintenance, and structural fastening tasks that require reliable torque transfer without socket failure. The 6-point drive geometry reduces fastener rounding under high-torque impact conditions, making it appropriate for production and field service use alike.

Key Features

• 1-inch square drive fits standard heavy-duty impact wrenches
• 38mm socket size for large hex fasteners common in industrial and mechanical applications
• 6-point contact design reduces fastener rounding under high-torque impact loads
• Alloy steel construction rated for impact use
• 4-inch overall length for reach in standard and moderate deep-access scenarios

Compatibility

Designed for use with 1-inch drive impact wrenches and compatible with standard 1-inch drive socket accessories including extensions and universal joints rated for impact service.

Installation Notes

Installation and service work involving this socket should be performed by qualified mechanics or tradespeople familiar with impact tooling and torque requirements. Always verify the impact wrench and socket are rated for the torque being applied before use. Inspect the socket for cracks or wear before each use and remove from service if deformation is observed. Do not use impact sockets with hand-drive ratchets, as the wall thickness and hardness differ from standard chrome sockets.