Proto J3768T Flare Nut Wrench 1/2 X 9/16 Inches Double End

Product Description

The PROTO J3768T is a double-end, open-end flare nut wrench designed for gripping flare fittings and tube nuts in tight plumbing, HVAC, and refrigeration service applications. Built from steel with a satin finish, it features a 12-point head configuration and measures 7.5 inches overall length. The double-end design provides two sizes in one tool, with jaw openings of 1/2 inch and 9/16 inch. This wrench is a standard hand tool for licensed HVAC technicians and plumbers working on refrigerant line sets, fuel lines, and hydraulic or pneumatic fittings where a standard open-end wrench would risk rounding the nut.

This wrench is suited for residential and light commercial service work involving flare fittings on copper refrigerant lines, fuel oil lines, and similar tubing assemblies. The 1/2-inch and 9/16-inch jaw sizes cover common flare nut dimensions found throughout HVAC, refrigeration, and plumbing systems. It is a practical addition to any field service kit where fitting integrity and accessibility around tubing runs are concerns.

Key Features

• Double-end head provides 1/2-inch and 9/16-inch jaw openings in a single tool
• 12-point open-end head design for improved grip on flare and tube nuts
• Steel construction for durability in field and shop environments
• Satin finish reduces glare and provides corrosion resistance
• 7.5 inches overall length for access in confined service areas

Compatibility

Designed as a standard open-end flare nut wrench suitable for use with 1/2-inch and 9/16-inch flare fittings and tube nuts commonly found in HVAC, refrigeration, plumbing, and fuel line applications.

Installation Notes

This tool is used by HVAC technicians and plumbers during installation or service of flare-fitted tubing systems. Always recover or isolate refrigerant and depressurize lines before breaking any flare fitting connection. Use the correct jaw size to avoid rounding tube nuts, and apply steady, controlled force to prevent tube deformation. Follow applicable mechanical codes and manufacturer torque guidance for flare connections.