Crescent CFNWS0-05 Flare Nut Wrench Set Sae 0 Degree

Product Description

The CRESCENT CFNWS0-05 is a three-piece SAE flare nut wrench set designed for technicians who work on refrigerant lines, fuel lines, and hydraulic fittings where standard open-end wrenches risk rounding soft tubing nuts. Each wrench features a 0-degree offset flare nut end on both sides, giving the user full contact around the nut hex for reduced slippage. The set covers 3/8 inch by 7/16 inch, 1/2 inch by 9/16 inch, and 5/8 inch by 11/16 inch, spanning the most common SAE tubing nut sizes found in residential and light commercial HVAC and plumbing work. The set weighs 0.72 pounds total.

This wrench set is a standard tool for HVAC technicians tightening or loosening flare fittings on copper refrigerant lines, as well as plumbers working brake and fuel line connections. The 0-degree offset profile keeps the wrenches flat against the work surface, making them practical in tight equipment cabinets and confined mechanical spaces where angled wrenches cannot seat properly. Professional installers and service techs commonly reach for this set when servicing split systems, mini-splits, and any application using SAE flare fittings.

Key Features

• Three-piece set covers 3/8 x 7/16 inch, 1/2 x 9/16 inch, and 5/8 x 11/16 inch SAE sizes
• Flare nut end design wraps around the nut hex to reduce rounding on soft brass and aluminum fittings
• 0-degree offset keeps wrench profile flat for use in confined spaces and equipment panels
• SAE sizing matches standard domestic refrigerant and fuel line flare fittings
• Lightweight set at 0.72 pounds for easy transport in a field tool kit

Compatibility

Designed for use with SAE flare nut fittings across residential and light commercial HVAC, plumbing, and refrigeration applications requiring 3/8 inch through 11/16 inch wrench sizes.

Installation Notes

Flare nut wrenches are a hand-tool application requiring no power source, but technicians should ensure system refrigerant or fluid lines are properly recovered or isolated before loosening any fitting. Always confirm the correct wrench size seats fully around the nut before applying torque to avoid deforming the fitting. Work performed on refrigerant lines must comply with applicable EPA Section 608 regulations and local mechanical codes.

Technical Specifications

• Set Contents: 3/8 x 7/16 inch, 1/2 x 9/16 inch, 5/8 x 11/16 inch
• End Type: Flare Nut
• Offset Angle: 0 degrees
• Measurement Standard: SAE
• Weight: 0.72 pounds
• Sold As: Each (set of 3)

Standard Information

• Brand: CRESCENT
• Manufacturer Part Number: CFNWS0-05