Proto J4942CF Open End Crowfoot Wrench 1-5/16 in

Product Description

The PROTO J4942CF is a 1-5/16 inch open end crowfoot wrench designed for use with standard 3/8 inch or 1/2 inch drive ratchets and extensions. The crowfoot design allows access to fasteners in tight or recessed locations where a conventional open-end wrench cannot fit. With a head diameter of 0.53 inches and a head thickness of 0.38 inches, the J4942CF provides a low-profile engagement point on hex fasteners, fittings, and nuts. The chrome-plated finish resists corrosion and makes the tool easier to clean after service. Licensed tradespeople carrying this in their kit include HVAC technicians, plumbers, and pipefitters who regularly work on compression fittings, union connections, and threaded pipe assemblies.

This crowfoot wrench is suited for residential and commercial service work where access is limited by surrounding components or structural obstructions. Common applications include tightening or loosening flare nuts on refrigerant lines, compression fittings on water supply connections, and fasteners deep within mechanical assemblies. The 1-5/16 inch size covers a common fitting dimension found across HVAC, plumbing, and general mechanical systems. It pairs with any standard square-drive ratchet or torque wrench for controlled fastener engagement.

Key Features

• 1-5/16 inch open end size for direct engagement on hex fasteners and fittings
• Head diameter of 0.53 inches allows access in tight clearance areas
• Head thickness of 0.38 inches for low-profile fitment around obstructions
• Chrome-plated finish provides corrosion resistance and easy wipe-down after use
• Compatible with standard square-drive ratchets and torque wrenches
• Backed by a lifetime warranty from the manufacturer

Compatibility

Designed as a standard crowfoot attachment for use with 3/8 inch or 1/2 inch square drive ratchets, extensions, and torque wrenches. Fits 1-5/16 inch hex fasteners and fittings across HVAC, plumbing, and mechanical service applications.

Installation Notes

Installation and use should be performed by a qualified tradesperson familiar with proper torque tool techniques. Ensure the crowfoot is fully seated on the fastener before applying torque to prevent rounding. When using with a torque wrench at an offset angle, account for the crowfoot extension in final torque calculations per standard mechanical practice. Do not use with impact drivers.