This post contains affiliate links. As an Amazon Associate we earn from qualifying purchases.
Our picks are based on Amazon bestseller rankings, verified customer ratings, and product availability. We update our recommendations regularly to ensure accuracy.
Flared tube nuts are essential components for creating secure and leak-free connections in hydraulic and pneumatic systems. Ensuring you select the correct type and material is crucial for the longevity and safety of your automotive applications. This guide will help you navigate the options to find the most suitable flared tube nuts for your needs.
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.
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.
PREMIUM MATERIAL: Made of quality brass for superior corrosion resistance, high-temperature ductility, and long-lasting durability
LEAK-FREE CONNECTION: 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 APPLICATION: Works seamlessly with aluminum, copper, brass, and welded steel tubing, used in fuel, air, liquid, oil, gas, and vacuum lines, making it highly versatile for various applications
KEY FEATURES: The maximum working pressure is 150PSI and the temperature range is -65℉-250℉
PACKAGE CONTENTS: 2 X 5/8" SAE 45 Degree Flare Nut. Ideal for SAE flare connections and flare fittings
Wide Compatibility: The flare nut provide secure, leak-resistant connections between flared tubing and male flare fittings for easy assembly. Suitable for high-pressure propane, LP gas, natural gas, fuel, 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 nut 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
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.
PREMIUM MATERIAL: Made of quality brass for superior corrosion resistance, high-temperature ductility, and long-lasting durability
LEAK-FREE CONNECTION: 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 APPLICATION: Works seamlessly with aluminum, copper, brass, and welded steel tubing, used in fuel, air, liquid, oil, gas, and vacuum lines, making it highly versatile for various applications
KEY FEATURES: The maximum working pressure is 150PSI and the temperature range is -65℉-250℉
PACKAGE CONTENTS: 2 X 3/4" SAE 45 Degree Flare Nut. Ideal for SAE flare connections and flare fittings
Advantages : a series of different specification, covered various needs. Solid Brass Construction:crafted from high-quality solid brass for exceptional durability and corrosion resistance. Well machined, good threads with no rough edges. The threaded...
Please note - Designed For Tubing That Can Be Flared . The Size is mean the Tube OD, Not the thread size .
Versatile Application: Suitable for a wide range of plumbing, hydraulic, automotive, industrial applications and gas systems where a secure, leak-proof seal is required. you can reserve it as a sparts for Air conditioning, refrigerator, Fridge, travel...
For Use With Copper, Brass, Aluminum and someTubing that can be flared. Typically used in fuel, oil, air, LP propane, and natural gas lines, Fluid systems and Cooking Gas Appliances.
Nut reference: SAE 070110. Sleeve reference: SAE 070115. Dash size: 5. Thread size: 1/2-20. For use with 5/16" OD metal tubing. Maximum allowable working pressure: 5000 psi
High quality 316 stainless steel for superior mechanical strength and excellent resistance to corrosion
Silver-plated nut threads reducing friction for easy disconnection and retightening
Precision engineered to provide leak-tight connections for high pressure gas and liquid applications
Designed and manufactured in compliance with SAE J514
Last update on 2026-07-17 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Flared Tube Nuts
Comparison Tips
When comparing options, focus on the material's suitability for your fluid type and operating environment. Check the specified flare angle (37° or 45°) to match your existing tubing. Verify the tubing outside diameter and thread size are exact matches for your application. Read reviews to gauge user experiences regarding ease of installation and long-term performance.
Frequently Asked Questions
What is the difference between 37-degree and 45-degree flares?
The degree refers to the angle of the flare on the tubing. 37-degree flares are common in high-pressure hydraulic systems and aerospace, while 45-degree flares are typically found in automotive brake and fuel lines.
Can I use a brass nut on a steel fitting?
Generally, yes, but it's best to match materials for optimal performance and to prevent galvanic corrosion, especially in harsh environments. Check compatibility with the fluid being used.
How do I determine the correct size flared tube nut?
You need to know the outside diameter of the tubing and the thread size of the fitting it will connect to. The thread size is often denoted by a dash number (e.g., -4, -6).
What happens if I over-tighten a flared tube nut?
Over-tightening can deform or crack the flare on the tubing, or damage the sealing surface of the fitting. This can lead to leaks and require replacement of components.
Are flared fittings self-sealing?
Yes, flared fittings create a seal through the metal-to-metal contact between the flared end of the tubing and the fitting body. Sealants are typically not required for the flare itself.
What is the function of a flared tube nut?
The primary function of a flared tube nut is to secure the flared end of a tube to a fitting body, creating a strong and leak-resistant mechanical seal for fluid or gas lines.
As an Amazon Associate, we earn from qualifying purchases. Product prices and availability are accurate as of the date/time indicated and are subject to change.
We use cookies to enhance your experience. By continuing to visit this site you agree to our use of cookies. Read our Privacy Policy
Before You Go!
Get the latest deals and product comparisons delivered to your inbox.
