Apex 81681 Flare Nut Wrench 3/8 X 7/16 Inch Chrome

Product Description

The APEX 81681 is a dual-size flare nut wrench designed to loosen and tighten hex nuts in tight spaces where tubing is present, such as fuel lines, brake lines, and HVAC refrigerant line fittings. Sized at 3/8 inch on one end and 7/16 inch on the other, it consolidates two sizes into a single tool at 5.984 inches in overall length and 0.15 pounds. Constructed from alloy steel with a full polish chrome finish, this wrench is built for repeated use in corrosive or fluid-exposed service environments. Plumbers, HVAC technicians, and brake system specialists will find it a practical addition to any line-work toolkit.

This wrench is suited for residential and light commercial service work involving tubing connections. Common applications include tightening and breaking loose flare fittings on refrigerant lines, fuel supply lines, and hydraulic brake system fittings. The open-throat design allows the wrench to seat around tubing before engaging the hex nut, reducing the risk of rounding the fitting. Each wrench covers two standard sizes, reducing the number of individual tools required on the job.

Key Features

• Dual-size design: 3/8 inch and 7/16 inch on a single wrench
• Open-throat flare nut profile grips hex nuts with tubing present
• Alloy steel construction for strength and durability in field use
• Full polish chrome finish resists corrosion and simplifies cleaning
• Compact at 5.984 inches — fits standard tool rolls and boxes
• Sold individually; one piece per unit

Compatibility

Designed for use on standard hex flare nuts found on fuel lines, brake lines, and refrigerant tubing connections in automotive, plumbing, and HVAC applications.

Installation Notes

Shut off fluid supply or recover refrigerant charge before loosening any flare fitting. Seat the wrench fully around the hex nut before applying torque to avoid deforming the fitting. Follow applicable codes — including IFGC, IPC, or vehicle manufacturer service procedures — when working on gas, plumbing, or brake lines. Inspect flare seats for damage or debris before re-torquing any connection.

Technical Specifications

• Size 1: 3/8 inch
• Size 2: 7/16 inch
• Overall Length: 5.984 inches
• Weight: 0.15 pounds
• Material: Alloy Steel
• Finish: Full Polish Chrome
• Sold As: Each
• UPC: 099575816819

Standard Information

• Brand: APEX
• Manufacturer Part Number: 81681