BRASS FLARE NUTS

Product Description

Brass Flare Nuts are specialized fasteners used to create high-pressure, leak-proof mechanical joints in tubing systemsmost commonly in HVAC, refrigeration, and automotive brake lines. Unlike standard nuts, they are designed to work in tandem with a flared tube end to create a metal-to-metal seal without the need for gaskets or PTFE tape.

1. How a Flare Joint Works

The connection relies on the geometry of the components:

• The Tube: The end of a copper or aluminum tube is expanded into a bell shape (usually at a 45 angle for plumbing/HVAC or 37 for AN/Aerospace).

• The Fitting: The flare nut is slid onto the tube before flaring.

• The Seal: As the nut is tightened onto a male flare fitting, it wedges the flared tubing between the nut and the fitting's nose, creating a high-pressure seal.

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2. Forged vs. Machined Brass

In professional applications, the manufacturing process of the nut is critical:

• Forged Flare Nuts: These are stronger and more resistant to "stress corrosion cracking." They are preferred for refrigeration systems (like R-410A) where pressures are extremely high and temperature fluctuations are frequent.

• Machined (Hex) Flare Nuts: Often cut from hexagonal brass rod. While sufficient for low-pressure gas or water lines, they may have less structural integrity than forged versions under extreme vibration.

Reliable Quality and Versatile Sizing

Our brass flare nuts are manufactured using premium brass, ensuring durability and corrosion resistance. With size options including 1/2, 1/4, 3/8, and 5/8, they are suitable for various hardware fitting applications. The precise threading and robust construction guarantee a secure fit, making them a reliable choice for professionals across different sectors.


Wide Application and Easy Installation

These brass flare nuts are specifically designed for hardware fittings and are compatible with multiple plumbing, industrial, and HVAC installations. The user-friendly design allows for straightforward assembly, providing leak-free and strong connections. Their versatility and ease of use make them a preferred component in both residential and commercial projects.