FAQ: What Does Inverted Flare Mean?

Inverted Flare Hydraulic Fittings are widely used in hydraulic brake, power steering, fuel lines and transmission cooler lines. Inverted flare fittings are inexpensive and reusable. Inverted flare provides excellent vibration resistance. Seats and threads are internal and protected.

What is a inverted flare on a tube?

Inverted Flare Hydraulic Tube Fittings Recommended or use in hydraulic brake, power steering, fuel lines and transmission cooler lines. Inverted flare provides excellent vibration resistance. Seats and threads are internal and protected. Short nut (available in brass or steel) allows very close tube bends.

Is an inverted flare the same as a double flare?

It’s called inverted because the adapters are female and the nuts on the lines are male. DOUBLE flare has nothing to do with the types of fittings or inverted or SAE. Double flare means you make a “double fold” with the tool. This folds the raw edge of the line in like a cuff on your pants to prevent it from splitting.

What angle is inverted flare?

In the first image above, the SAE double inverted flares are considered to have a 45 degree angle – this angle matches the female end of the fitting, whereas the male end has a 42 degree angle. During assembly, as the tube nut is tightened, the male end deforms to match the angle of the female end.

Is inverted flare bubble flare?

The SAE/double (inverted/45degree) flare and the DIN/ISO bubble flare. We will refer to them as SAE or DIN flare. The most common is the SAE flare. If your brake line looks like a tiny funnel going into the ID of the tubing, and the back side of the flare is at a 45 degree angle, then it is the SAE flare.

What are inverted flare nuts for?

These flare nuts are designed to help resist mechanical pull out and are ideal for use with aluminum, brass, copper, and welded steel tubing that can be flared. Use in gas or liquid applications that can be assembled and disassembled repeatedly.

What type of flare is used mostly in the United States?

Law enforcement in the United States usually use magnesium based flares that last from 15-30 minutes.

Will single flare work on brake lines?

1. Single Flares are only acceptable on low-pressure lines, but not acceptable for high-pressure brake systems. A single flare is just as it sounds, the line is flared out just once in a conical shape. Single flares are not acceptable for brake lines and tend to crack and leak quite easily.

What type of flare is best for brake lines?

All brake lines need to be double flared, due to the high hydraulic pressure. If your brakes leak or the hoses crack, it could prove to be fatal. Single flared lines are suitable for low-pressure lines in other applications, but not your vehicle’s brakes.

What are flare fittings used for?

Flared fittings are also a good option for use with heavy machinery, and industrial and construction equipment. They are the fitting is most commonly used to connect tube or hose in high-pressure and high-temperature applications. The flare fitting is commonly used world-wide because it is a simple construction.

What is the difference between flare and compression fittings?

Generally speaking, compression outlets are used for water and compressed air lines, where slight leakage isn’t going to cause too much of a problem. Flared outlets are used for gas and high-pressure lines, where even a little leakage can cause major problems if left unattended.

Where are 37-degree flares used?

Defined by MIL-F-18866 and SAE J514 standards, these flare fittings have been machined to have a 37° flare seating surface. These fittings are most commonly used in fluid power and fuel delivery applications, especially those using high pressure.

Are all flare fittings the same?

AN 37° flare and industrial 37° flare fittings function identically. In many cases they appear to be functionally interchangeable, but they are not. What this means is that while the products may look similar, you must not use an industrial 37° flare fitting design as a direct substitution.