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Flared tube fittings are essential components for creating reliable, leak-free connections in various fluid and gas systems. Selecting the appropriate fitting ensures the integrity and safety of your industrial applications, preventing costly failures and downtime. This guide will help you navigate the key considerations for choosing the best flared tube fittings for your needs.
【Package Include】2PCS brass 3/8" flare female to 3/8" flare male swivel 90° elbow union.
【90° Elbow & 360° Swivel】90 degrees elbow design can easily change the direction of the pipeline, while 360 degrees swivel greatly improves flexibility.
【Solid Brass】The fittings are made of solid brass, which is thicker and stronger, durable, threads are deep and accurate, high corrosion resistance, low magnetic permeability and high temperature ductility.
【Solid Connection】The positive nature of the connection with the flare on the tube clamped between the nut and the body makes for extreme dependability and safety.
【Widely Used】Suitable for use with gas range, heaters, HVAC work, burner stove, propane, grill, grease, fuels, LP and natural gas, refrigeration, instrumentation and hydraulic systems in low and medium pressure pipe line connections.
Packing List: this package includes 6 brass SAE 45 degree flare plugs in 6 sizes: 1/4", 3/4", 5/16", 3/8", 1/2", 5/8", 6 brass flared cap assortment kits in 6 sizes: 1/4", 3/4", 5/16", 3/8", 1/2", 5/8", 12 pcs in total, enough to meet your use and...
Strong and Reliable: the SAE 45 degree flare tube fitting is made of quality brass, reliable and strong, has good rust and corrosion resistance, high temperature resistance, good sealing, high temperature ductility and low permeability, serving you for a...
Satisfactory Functions: sAE 45 degree flare tube fitting seal plugs can work under harsh conditions, are a good choice for metal seals; Designed for high pressure use and have good resistance to mechanical pulling, they can nicely meet your use demands
Safe to Use: our SAE 45 degree flare tube fitting can provide a reliable connection with the flare on the pipe clamped between the nut and the body, safe and reliable, tight and stable, allowing you to use it with confidence
Extensive Usage: the SAE 45 degree flared tube fitting is ideal for LP and natural gas, refrigeration, and hydraulic applications, propane production lines, low pressure, RV furnaces, water heaters and more, can effectively block gas pipelines and prevent...
Package Contents: Each package contains a pack of 1/4-inch and 3/8-inch air conditioning pipe coupling adapters with flare nuts, suitable for various air conditioning pipe installation and maintenance scenarios
High-quality Materials: Our mini split adapter is made of high-quality solid copper, with excellent durability, corrosion resistance and long-lasting performance.
Versatile Specifications: These copper pipe fittings are carefully designed to perfectly match 1/4-inch (6.35 mm) and 3/8-inch (9.53 mm) diameter copper pipes, and the versatile specifications can meet the needs of copper pipe extension
Easy Installation: Mini split vacuum adapters are designed to connect two copper pipes, no welding is required, just slide in the flare nut, align and tighten with a wrench.
Multi-Purpose: Air conditioning copper pipe extender, suitable for double-joint flare fittings, can also be used in oil and gas systems, pipelines, refrigeration and vacuum applications.
SIZE - 3/8" Male Flare x 3/8" Male Flare Union Flare Fittings&3/8" Flare Nuts. Flare end is SAE 45 degrees, please refer to the dimension drawing for specific diameter.
MATERIAL - Made of high-quality brass, with strong wear and corrosion resistance, high compressive strength, durability, low magnetic permeability and high temperature ductility.
USE - Suitable for gas, instrumentation, refrigeration, vacuum lines, power steering, hydraulic and pneumatic systems, manufactured for low and medium pressure piping connection engineering.
WORKING PRESSURE & TEMPERATURE - 1200PSI maximum working pressure, temperature range -65°F to +250°F (-53°C to +121°C)
WORKING PRINCIPLE - The end of the tube is flared to a 45° angle, creating a sealing surface that mates with the fitting's cone. When the nut is tightened, the flared tube is compressed against the cone, forming a leak-proof metal-to-metal seal. This...
SECURE, LEAK-FREE CONNECTION: Provides reliable sealing for fuel, oil, LP, and natural gas applications, ensuring a stable joint even in high-pressure, vibrating environments. Ideal for SAE flare connections and flare fittings.
PREMIUM BRASS CONSTRUCTION: Crafted from high-quality brass for superior corrosion resistance, high-temperature ductility, and long-lasting durability. A robust flare nut solution and effective flare tube fitting alternative.
VERSATILE COMPATIBILITY: Works seamlessly with aluminum, copper, brass, and welded steel tubing, making it perfect for plumbing and HVAC projects. A top choice among hvac flare fittings and copper tube fittings.
ROBUST PERFORMANCE: Engineered to withstand up to 150 PSI and operate within a temperature range of -65°F to +250°F, ensuring dependable performance under demanding conditions. Excellent for flared tube fittings in critical applications.
EASY INSTALLATION & REUSABILITY: Features precise thread specifications for a secure fit, enabling quick installation and effortless maintenance for new builds and repairs. An ideal, reusable design that enhances flare fittings efficiency.
Wide Compatibility: This half union coupling provides a secure, quick-connect solution between flared tubing and threaded pipes. Engineered for high-pressure propane, LP gas, natural gas, fuel delivery, refrigeration, plumbing, and vacuum applications
High-Grade Brass: Made from high-purity brass with low magnetic permeability, excellent corrosion resistance, and thermal ductility. These brass flare fitting are precision-machined under strict quality control to ensure reliable, long-lasting performance
Leak-Proof Connection: Precision flare half union fitting delivers durable, leak-tight seals for fuel, oil, gas, air, and fluid lines. Compatible with copper, brass, aluminum, and steel tubing, built to withstand high pressure and harsh conditions
High Durability: Rated for pressures up to 1200 PSI and operating temperatures from -65°F to +250°F, this brass flared tube fitting delivers reliable performance and long service life in tough, high-pressure systems
Non-Potable Use: Contains low lead and is NOT for use with potable water in the USA, as per federal regulations
SIZE - 3/8" Male Flare x 1/4" NPT Male Half Union Flare Fittings. Note, NPT thread is the nominal pipe size and does not represent the actual diameter, please refer to the dimension drawing for specific diameter.NPT is a tapered pipe thread with a...
MATERIAL - Made of high-quality brass, with strong wear and corrosion resistance, high compressive strength, durability, low magnetic permeability and high temperature ductility.
USE - Suitable for gas, instrumentation, refrigeration, vacuum lines, power steering, hydraulic and pneumatic systems, manufactured for low and medium pressure piping connection engineering.
WORKING PRESSURE & TEMPERATURE - 1200PSI maximum working pressure, temperature range -65°F to +250°F (-53°C to +121°C)
WORKING PRINCIPLE - The end of the tube is flared to a 45° angle, creating a sealing surface that mates with the fitting's cone. When the nut is tightened, the flared tube is compressed against the cone, forming a leak-proof metal-to-metal seal. This...
SIZE: 1/4" Flare Male x 3/8" Flare Female, has a 45-degree flare connection on both ends. NOTE: Thread size is a nominal pipe size and it does not represent the actual diameter, please check the size you need before ordering
QUALITY MATERIAL: Solid brass construction for corrosion resistance, high temperature ductility and low magnetic permeability. Suitable for copper, brass, aluminum, and steel tubing
SUPERIOR PERFORMANCE: Precisely milled, threads are tighter, deeper, smoother than regular products, making work easier and more efficient
FUNCTION: Union for connecting and disconnecting two pipes more easily than couplings. Great for using with LP and natural gas, refrigeration, and hydraulic applications
APPLICATION: Use with fuel and gas systems, plumbing, refrigeration, and vacuum applications
【Material】: Made of premium solid brass with a longer service life, stronger and more durable than iron and iron galvanized pipe fittings.
【Advantage】: The positive nature of the connection with the flare on the tube clamped between the nut and the body makes for extreme dependability and safety.
【Application】: LP and natural gas, flammable liquids (special order), instrumental, refrigeration. power steering, hydraulic and pneumatic systems.Not for use in potable Drinking water applications.
【SIZE】:1/2" female flare by 1/2" female flare Swivel union.
【Package Include】: 2 PCS 1/2" female Flare by 1/2" female flare adapter. Comes with 1 year guarantee.
【Flare Thread】The positive nature of the connection with the flare on the tube clamped between the nut and the body makes for extreme dependability and safety.
【Material】Heavy Duty Brass, firm and durable. Brass for corrosion resistance, high temperature ductility and low magnetic permeability.
【Temperature Range】From -53℃ to 121℃ (-65℉ to 250℉).
【Use】The flare threaded connects to a flared tube or fitting, and is suitable for use with fuel and gas systems. Use with fuel and gas systems, plumbing, refrigeration, and vacuum applications.
Last update on 2026-07-17 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Flared Tube Fittings
Understanding Flared Fittings
Flared fittings create a seal by deforming a tube end into a cone shape that mates with the fitting body. This mechanical seal is robust and less prone to vibration loosening than some other connection types. They are commonly used in high-pressure, high-vibration applications found in automotive, hydraulic, and pneumatic systems.
Material Considerations
The material of the fitting is crucial for compatibility with the fluid being conveyed and the operating environment. Common materials include:
Brass: Offers good corrosion resistance and is cost-effective for many general applications.
Stainless Steel: Provides superior strength, durability, and resistance to corrosion, making it ideal for harsh environments and aggressive fluids.
Steel (Plated): Often used for general hydraulic applications, offering a balance of strength and cost. Plating enhances corrosion resistance.
Types of Flared Fittings
There are several common configurations to consider:
SAE Double Flare: The standard for most automotive and light hydraulic applications in North America.
Inverted Flare: Features a flare on the inside of the fitting body, often used in automotive brake and fuel lines.
Single Flare: Less common for high-pressure systems but may be found in some low-pressure applications.
Sizing and Compatibility
Proper sizing is paramount. Flared fittings are typically specified by the outside diameter of the tubing they connect. Ensure the fitting size matches the tubing diameter precisely. Also, verify that the fitting's thread size and type (e.g., SAE, NPT) are compatible with the components it will connect to. Consult manufacturer specifications for detailed compatibility information.
Installation Best Practices
Proper installation is key to a leak-free seal. Ensure the tube end is properly flared using the correct tool, creating a uniform cone. The flare should be free of cracks or imperfections. When assembling, use two wrenches – one to hold the fitting body and the other to tighten the nut, preventing stress on the tubing.
Frequently Asked Questions
What is the difference between single and double flare fittings?
A single flare has a single cone, while a double flare creates a double-walled cone on the tube end. Double flares are generally stronger, more durable, and provide a more reliable seal, making them preferred for higher pressure and critical applications.
Can I use brass fittings with all types of fluids?
Brass fittings are suitable for many common fluids like water, air, and certain oils. However, they may not be ideal for aggressive chemicals or high-purity systems where stainless steel might be a better choice due to its superior chemical resistance.
How do I determine the correct size for a flared fitting?
Flared fitting sizes are typically based on the outside diameter of the tubing you are connecting. You need to measure the tubing's outer diameter accurately and select a fitting designed for that specific tubing size.
What tools are needed to install flared fittings?
You will need a tubing cutter to ensure a clean, square cut, a flaring tool to create the appropriate flare on the tube end, and two wrenches for assembly to properly tighten the fitting without damaging the tubing.
Are flared fittings suitable for very high temperatures?
The temperature rating of flared fittings depends heavily on the material and the specific design. Stainless steel fittings generally offer better performance at higher temperatures compared to brass or plated steel.
How tight should I make a flared fitting connection?
Tighten the fitting until it feels snug, then typically an additional 1/2 to 3/4 turn is sufficient for most connections. Over-tightening can damage the flare or the fitting, leading to leaks. It's best to consult the manufacturer's recommendations.
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