Proto J4914MCF Open End Crowfoot Wrench 1-3/16 in

Product Description

The PROTO J4914MCF is an open end crowfoot wrench designed for use with 3/8-inch or 1/2-inch drive ratchets, extensions, and torque wrenches where a standard socket or box wrench cannot reach. It features a 1-3/16 inch head diameter with a 1/4 inch head thickness, making it suited for fasteners in confined or obstructed spaces. The chrome-plated finish provides corrosion resistance for tool storage in shop or field environments. Overall length is 1.5 inches. This wrench meets ASME B107.21 and Federal Specification GGG-C-1507b standards and is backed by a limited lifetime warranty. Mechanics, millwrights, and maintenance technicians rely on crowfoot wrenches when inline access is restricted.

Open end crowfoot wrenches are commonly used in automotive, industrial maintenance, and mechanical assembly applications where fastener location prevents a ratchet with a standard socket from engaging properly. The low-profile 1/4 inch head thickness allows access in shallow recesses. This wrench is appropriate for residential and commercial mechanical work, including HVAC equipment servicing, plumbing fixture connections, and general equipment maintenance where a flat open-end engagement is required on an accessible fastener in a tight space.

Key Features

• 1-3/16 inch open end head diameter for direct fastener engagement
• 1/4 inch head thickness for low-clearance and recessed fastener access
• 1.5 inch overall length for compact fit in confined areas
• Chrome-plated finish for corrosion resistance and tool longevity
• Meets ASME B107.21 and Federal Specification GGG-C-1507b standards
• Limited lifetime warranty

Compatibility

Designed for use with standard 3/8-inch or 1/2-inch drive ratchets, torque wrenches, and extensions as an OEM-style crowfoot attachment for open end fastener applications.

Installation Notes

Crowfoot wrenches are installed by qualified mechanics and maintenance technicians. Ensure the drive tool and crowfoot are fully seated and properly aligned before applying torque. When using a crowfoot with a torque wrench at an angle offset from inline, consult the torque wrench manufacturer guidance for angle correction. Do not use extensions or adapters that exceed the rated drive capacity of the wrench head.