Proto J4920MCF Open End Crowfoot Wrench 1-5/8 in

Product Description

The PROTO J4920MCF is an open end crowfoot wrench designed for use in tight, restricted spaces where a standard wrench cannot seat properly. The crowfoot head attaches to a 3/8-inch or 1/2-inch drive torque wrench or extension, allowing controlled torque application without direct handle access. The head diameter measures 1-5/8 inches with a head thickness of 1/4 inch and an overall length of 2-1/16 inches. A chrome-plated finish provides corrosion resistance and makes the tool easy to clean. This wrench is used by mechanics, millwrights, and industrial maintenance technicians working on fasteners in confined areas.

The J4920MCF fits applications where a standard box or open end wrench cannot swing freely due to surrounding components, piping, or structural obstructions. Common use scenarios include automotive underhood work, hydraulic line fittings, industrial machinery maintenance, and plumbing fixture connections where a full-handle wrench is not practical. The tool is designed to work with any standard square-drive ratchet or torque wrench at the appropriate drive size.

Key Features

• 1-5/8 inch open end crowfoot head for restricted-access fastener work
• 1/4 inch head thickness for low-clearance applications
• 2-1/16 inch overall length for compact reach
• Chrome-plated finish for corrosion resistance and easy cleaning
• Meets ASME B107.21 and Federal Specification GGG-C-1507b standards
• Limited lifetime warranty from PROTO

Compatibility

Designed as a standard crowfoot wrench for use with 3/8-inch or 1/2-inch square-drive ratchets, extensions, and torque wrenches in automotive, industrial, and maintenance applications.

Installation Notes

This tool is used by mechanics and maintenance technicians and does not require permanent installation. Ensure the square drive connection between the crowfoot and the ratchet or torque wrench is fully seated before applying force. When using with a torque wrench, account for any offset angle to maintain torque accuracy. Keep the tool clean and inspect the drive socket opening for wear before use.