What are metric flare nut wrenches used for?

Metric flare nut wrenches, also known as line wrenches, are specifically designed for loosening and tightening fittings on hydraulic lines, brake lines, fuel lines, and other tubing systems. Their unique design, with a box-end opening that grips multiple sides of the nut, helps prevent rounding and damage to the fitting, which is common with open-end wrenches.

What sizes are typically included in a metric flare nut wrench set?

Metric flare nut wrench sets typically include a range of common sizes to accommodate various applications. You'll often find sets containing sizes from 8mm to 19mm, covering the most frequently encountered fittings in automotive, industrial, and plumbing systems. Some sets may include larger or smaller sizes depending on the intended use.

Which brands of metric flare nut wrench sets does ToolSource carry?

ToolSource offers a wide selection of metric flare nut wrench sets from leading brands in the industry. You can find sets from GearWrench, SK Hand Tool, Stanley Proto Industrial Tools, Genius Tools, KD Tools, VIM Tools, Astro Pneumatic, and Armstrong, among others. With 36 different metric flare nut wrench sets available, you're sure to find the right set for your needs.

What should I look for when choosing a metric flare nut wrench set?

When selecting a metric flare nut wrench set, consider the quality of the steel used, the precision of the wrench openings, and the overall durability of the set. Look for sets made from high-quality alloy steel for strength and longevity. Also, consider the number of wrenches included and whether the sizes meet your specific application requirements.

Are there different types of metric flare nut wrench sets available?

Yes, metric flare nut wrench sets are available in different configurations. You can find standard sets with a fixed head, as well as sets with ratcheting mechanisms for faster and easier use in tight spaces. Some sets also feature angled heads for improved access to hard-to-reach fittings.

How do I properly use a metric flare nut wrench to avoid damaging fittings?

To avoid damaging fittings, ensure the wrench is fully seated on the flare nut before applying force. Apply steady, even pressure and avoid jerking or excessive force. If the fitting is particularly stubborn, consider using a penetrating oil to help loosen it before attempting to turn it with the wrench.

What is the advantage of using a flare nut wrench over a regular open-end wrench?

Flare nut wrenches provide a more secure grip on fittings compared to open-end wrenches. The enclosed design of the flare nut wrench distributes force over more of the nut's surface, reducing the risk of rounding or damaging the fitting, especially when dealing with corroded or tightly fastened connections.

Are metric flare nut wrenches only for automotive applications?

While metric flare nut wrenches are commonly used in automotive repair for brake lines and fuel lines, their applications extend beyond the automotive industry. They are also valuable tools for working on hydraulic systems, refrigeration lines, and other tubing systems in industrial, plumbing, and HVAC settings.

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SuperKromer Metric Flare Nut Wrench Set - 6 Piece - SK Hand Tool

Name: SuperKromer Metric Flare Nut Wrench Set - 6 Piece
Brand: SK Hand Tool
SKU: 57743
Price: 171.75 USD
Availability: LimitedAvailability

Part #: 376

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The SK Hand Tool 376 SuperKromer Metric Flare Nut Wrench Set is engineered for professional technicians requiring precision and reliability when servicing delicate tubing fittings. This 6-piece metric set provides a secure, non-slip grip on soft metal flare nuts, significantly reducing the risk of rounding in automotive, industrial, and HVAC applications. Designed for demanding daily shop use, it ensures consistent fastener integrity and precise torque transfer.

Key Features

6-Piece Metric Coverage: Offers essential metric sizes, making it ideal for brake, fuel, clutch, power steering, and A/C lines on a wide range of import and domestic vehicles.
Flare Nut Box Design: Features a specialized 5-sided contact grip that surrounds more of the fastener than traditional open-end wrenches, minimizing the potential for damage to soft metal fittings and tubing nuts.
SuperKromer Corrosion-Resistant Finish: A durable chrome finish provides robust protection against common shop chemicals, moisture, and general wear, ensuring tool longevity and maintaining a professional appearance.
Precision-Machined Openings: Each wrench features accurate hex profiles for a tight, non-slip fit, facilitating consistent torque transfer and enhancing control in confined work environments.
Professional-Grade Construction: Built from quality SK steel using advanced manufacturing processes, this set delivers reliable performance and durability for full-time automotive, industrial, and maintenance technicians.

Applications

Automotive: Essential for servicing brake lines, fuel lines, ABS systems, power steering, clutch hydraulics, and A/C fittings on passenger cars, light trucks, and fleet vehicles where delicate fittings require precise handling.
HVAC/R: Designed to effectively tighten and loosen flare fittings and service valves on refrigeration and air conditioning lines, helping to prevent distortion of the nut during service.
Plumbing & Industrial: Suitable for working on copper, aluminum, and other soft-metal tubing connections where line integrity and preservation of fitting shape are critical.
General Maintenance: Provides an optimal solution in scenarios where a standard open-end wrench might slip or cause damage to delicate hex fittings, ensuring secure engagement.