Proto J5342MCF Open End Crowfoot Wrench Metric

Product Description

The PROTO J5342MCF is a metric open end crowfoot wrench designed for use with standard 3/8-inch or 1/2-inch drive torque wrenches and extensions. The crowfoot design allows access to fasteners in confined spaces where a standard open end wrench cannot reach. The chrome-plated finish resists corrosion and simplifies cleanup in shop environments. At 3.8 inches in overall length and 0.69 pounds, it is a compact, single-piece tool suited for mechanical, HVAC, and plumbing service work where precise torque application is required.

This crowfoot wrench is used in applications where a technician needs to apply controlled torque to a nut or fitting in a restricted area. Common scenarios include tightening flare fittings, service valve packing nuts, and hydraulic line connections on equipment with limited clearance. The metric sizing makes it appropriate for service work on imported equipment and systems with metric fasteners. It is a hand tool used across trades including HVAC, plumbing, and general mechanical service.

Key Features

• Open end crowfoot design fits torque wrenches and extensions with standard drive sizes
• Metric system of measurement for compatibility with metric fastener applications
• Chrome-plated finish for corrosion resistance and ease of cleaning
• Compact overall length of 3.8 inches for work in tight spaces
• Limited lifetime warranty coverage

Compatibility

Designed for use with standard 3/8-inch and 1/2-inch square drive torque wrenches and ratchet extensions as a metric open end crowfoot attachment.

Installation Notes

Used by HVAC technicians, plumbers, and mechanical service professionals. Ensure the drive size of your torque wrench or ratchet matches the crowfoot drive opening before use. Apply torque according to the fastener or fitting specification from the manufacturer. Do not use impact drivers with this tool.