Proto J77518MP Impact Socket 3/8 in Drive 18mm

Product Description

The PROTO J77518MP is a 12-point impact socket designed for use with 3/8 inch drive impact wrenches and ratchets. Built from alloy steel, it delivers the torsional strength needed to withstand repeated impact cycling without cracking or rounding. The socket measures 2-3/32 inches overall length and fits an 18mm fastener. It is intended for professional mechanics, maintenance technicians, and trade professionals who require a durable, reliable socket for high-torque applications in automotive, industrial, and mechanical service environments.

This socket is suited for both shop and field use where 18mm fasteners are common, including engine components, suspension hardware, and general mechanical assemblies. The 12-point configuration allows engagement at every 30 degrees of rotation, providing flexibility in tight or restricted access situations. The 3/8 inch drive size makes it compatible with a wide range of standard impact and hand-drive tools commonly found in professional toolkits. It conforms to ASME specification B107.2, meeting dimensional and performance standards for hand and impact sockets.

Key Features

• 3/8 inch drive fits standard impact wrenches and ratchets
• 18mm socket size for common metric fasteners
• 12-point design allows engagement every 30 degrees for use in confined spaces
• Alloy steel construction provides impact-rated torsional strength
• Meets ASME B107.2 dimensional and performance standards
• 2-3/32 inch overall length suits typical service depth requirements

Compatibility

Designed as an OEM-style replacement or direct-fit socket for professional 3/8 inch drive impact and hand-drive tool sets requiring an 18mm metric socket.

Installation Notes

Install and remove using standard 3/8 inch drive impact wrenches, air ratchets, or hand ratchets. Ensure the socket is fully seated on the fastener before applying torque to prevent rounding. Inspect the socket for cracks or deformation before each use, and remove from service if any damage is found. This tool is intended for use by qualified mechanics and trade professionals familiar with proper torque tool handling.