Proto J4923MCF Open End Crowfoot Wrench Metric

Product Description

The PROTO J4923MCF is an open end crowfoot wrench designed for accessing fasteners in tight or obstructed spaces where a standard wrench cannot reach. It features a chrome-plated finish for corrosion resistance and durability in demanding shop and field environments. The head measures 2-1/32 inches in diameter with a 1/4-inch head thickness, and the overall length is 2-11/32 inches. This tool is built to ASME B107.21 and Federal Specification GGG-C-1507b standards, making it a reliable option for professional mechanics, millwrights, and maintenance technicians who require precision hand tools.

This crowfoot wrench is intended for metric fastener applications and is suited for use in automotive, industrial, and mechanical maintenance settings. Its low-profile head thickness allows access in recessed or confined locations where clearance is limited. The tool is sold individually and is compatible with standard 3/8-inch drive extension bars and ratchets, making it easy to integrate into an existing socket set for extended reach applications.

Key Features

• Open end crowfoot design provides access to fasteners in confined or obstructed spaces
• Head diameter of 2-1/32 inches with a head thickness of 1/4 inch for low-profile fitment
• Overall length of 2-11/32 inches
• Chrome-plated finish for corrosion resistance and easy cleaning
• Meets ASME B107.21 and Federal Specification GGG-C-1507b standards
• Metric system of measurement
• Backed by a Limited Lifetime Warranty

Compatibility

Designed for use with standard drive extensions and ratchets in metric fastener applications. Consult the PROTO J4923MCF product documentation to confirm fitment with specific drive sizes and fastener configurations.

Installation Notes

This tool should be used by qualified mechanics or maintenance technicians familiar with torque and fastener procedures. Ensure the crowfoot is fully seated on the fastener before applying force to prevent slippage or rounding. When used with a torque wrench and extension, account for the offset angle to achieve accurate torque values per the equipment manufacturer specifications. Inspect the tool for cracks or wear before each use and do not use damaged tools.