Brass Flare Fittings

Brass Flare Fittings – For Reliable Leak-Free Connections

Brass & Copper Parts manufactures and supplies Brass Flare Fittings engineered to provide superior sealing performance for gas, refrigeration, fuel, and hydraulic line connections. Featuring a 45° flare angle conforming to SAE J512 and SAE 45° flare standards, these fittings form a metal-to-metal seal without the need for gaskets or sealants — delivering long-term reliability in both high-vibration and high-pressure environments.

Our brass flare fittings are precision CNC-machined from high-integrity brass bar stock (CZ121 / CW614N / C36000), ensuring dimensional accuracy, consistent thread quality, and excellent machinability for ease of installation. They are widely used in HVAC/R systems, LP and natural gas lines, hydraulic circuits, and compressed air systems.

Key Features & Benefits

• Metal-to-Metal Seal: 45° SAE flare creates a positive, leak-free connection without gaskets or sealants.
• High Pressure Rating: Engineered for working pressures up to 3,000 PSI depending on size and configuration.
• Vibration Resistant: Rigid flare connection resists loosening under mechanical vibration — ideal for automotive and HVAC applications.
• Corrosion Resistant Brass: Natural dezincification-resistant brass options available for aggressive water environments.
• Wide Configuration Range: Available as male connectors, female connectors, unions, elbows (45° & 90°), tees, reducers, and caps.
• Thread Standards: SAE 45° Flare (SAE J512), UNF threads; also available in BSP and Metric on request.
• RoHS Compliant: Lead content compliant versions available for potable water and eco-sensitive applications.

Material Grades & Properties

Brass Flare Fitting Types & Sizes

Industry Applications

Brass Flare Fittings from Brass & Copper Parts find application in HVAC & refrigeration systems (as per ASHRAE standards), LP and natural gas distribution, compressed air and pneumatic circuits, automotive fuel and brake lines, medical gas systems, hydraulic power units, and residential and commercial plumbing. Their metal-to-metal sealing mechanism makes them especially suited where frequent disassembly and reassembly is required without seal degradation.

Related Product Range

Brass & Copper Parts manufactures a comprehensive range of flare-type fittings and accessories. Below are the key related product categories and terms associated with our Brass Flare Fittings range:

Brass Flare Nuts

Brass Flare Nuts (also known as flare tube nuts or flare compression nuts) are hex-shaped coupling nuts designed to secure the flared tube end against the fitting body seat. Manufactured from free-machining brass (CZ121 / C36000), our flare nuts feature precisely machined internal 45° cone seats to ensure a positive metal-to-metal seal. Available in sizes from 3/16″ to 3/4″ tube OD with matching SAE UNF threads, these nuts are interchangeable with standard SAE J512 fittings. Related terms: brass tube nut, flare union nut, flare coupling nut, SAE flare nut, brass compression nut.

Brass Olives for Flare Fittings

Brass Olives for Flare Fittings — sometimes referred to as flare ferrules or flare sleeves — are used in conjunction with flare nuts to create a compression-assisted seal on soft tubing. Our brass olives are manufactured to precise dimensional tolerances ensuring uniform compression and a leak-free grip on copper, aluminium, and soft brass tubing. Suitable for gas, water, and refrigeration lines. Related terms: brass ferrule, flare sleeve, compression olive, tube olive, brass compression ring, flare ring, tube ferrule.

Brass Flare Unions

Brass Flare Unions provide a convenient tube-to-tube connection using the 45° SAE flare principle, allowing the line to be disconnected and reconnected without cutting or re-flaring the tube. Ideal for service access points in refrigeration loops, gas distribution, and hydraulic circuits. Our flare unions are available as equal bore or reducing configurations. Related terms: flare tube union, brass union fitting, SAE flare union, double flare union, equal union flare, reducing flare union, brass straight union.

Brass Flare Connectors (Male & Female)

Brass Flare Connectors include both male and female variants for connecting flared tubing to threaded ports, valves, or equipment. Male Flare Connectors feature external SAE UNF threads on one end and a flare seat on the other; Female Flare Connectors use internal threads. Available in straight, elbow (45° and 90°), and tee configurations. Related terms: flare male adapter, flare female adapter, brass flare nipple, SAE male flare, SAE female flare, flare-to-NPT adapter, flare-to-BSP adapter, brass flare coupling.

Brass Flare Elbows & Tees

Brass Flare Elbows (available in 45° and 90° configurations) allow directional changes in tubing runs while maintaining the reliable SAE flare seal. Brass Flare Tees enable branch connections in the same system. Both are precision-machined from solid brass bar stock and are compatible with SAE J512 flare nuts and standard copper or aluminium tubing. Related terms: brass flare elbow 90, brass flare elbow 45, flare street elbow, brass flare tee fitting, SAE flare tee, equal flare tee, reducing flare tee.

Brass Flare Reducers & Adapters

Brass Flare Reducers connect two flared tubes of different diameters within the same system, eliminating the need for intermediate unions or adapters. Brass Flare Adapters allow transition between SAE flare ends and NPT, BSP, or Metric threaded ports. Custom bore configurations are available on request. Related terms: brass flare reducer, flare reducing union, flare-to-NPT adapter, flare-to-BSP adapter, flare-to-metric adapter, reducing flare connector, brass flare size reducer.

Brass Flare Caps & Plugs

Brass Flare Caps and Brass Flare Plugs are used to seal off open flare ends during pressure testing, system commissioning, or when a port is temporarily inactive. Their precision-machined internal seat ensures a leak-tight closure rated to the full working pressure of the system. Related terms: flare end cap, brass flare plug, SAE flare cap, tube end cap, pressure test cap, flare blanking plug.

Standards & Compliance

• Flare Standard: SAE J512 (45° Flare Tube Fittings)
• Thread Standard: SAE J514, ASME B1.13M
• Material: ASTM B16, BS EN 12164 (CZ121/CW614N)
• Pressure Rating: Per SAE J512 pressure-temperature tables
• Testing: Hydrostatic pressure tested per SAE and ASTM standards
• Certifications: CE, RoHS, REACH on request

Frequently Asked Questions (FAQ)

Q1. What is a flare fitting and how does it work?

A flare fitting creates a seal by compressing a flared tube end against a matching conical seat in the fitting body. When the nut is tightened, the flare and seat mate under high contact pressure to form a metal-to-metal seal. This eliminates the need for gaskets or thread sealants and provides a reusable, vibration-resistant connection.

Q2. What is the difference between SAE 45° flare and JIC 37° flare fittings?

The key difference is the flare cone angle — SAE 45° is standard for refrigeration, gas, and plumbing in North America, while JIC 37° is common in hydraulic systems. The two types are NOT interchangeable even if they appear similar. Brass & Copper Parts supplies both types; please specify your standard when ordering.

Q3. Can brass flare fittings be used with copper tubing?

Yes. Brass flare fittings are routinely used with soft copper and soft aluminum tubing, which are easily flared with a standard flaring tool. Ensure the tube is cut squarely, deburred, and the flare is formed to the correct 45° angle and diameter before assembly.

Q4. Are brass flare fittings suitable for natural gas and LPG lines?

Yes. Brass flare fittings are approved for use in natural gas and LP gas piping systems in most jurisdictions (check local codes). Our fittings meet AGA and CSA requirements. The metal-to-metal seal is inherently more reliable for gas service than soft-seat or thread-sealed connections.

Q5. What is DZR brass and when should I specify it?

DZR (Dezincification Resistant) brass contains small amounts of arsenic or antimony that prevent selective leaching of zinc from the brass matrix in aggressive water environments. Specify DZR (CW602N) grade when fittings will be used with potable water, especially in areas with aggressive, low-pH, or chlorinated water supplies.

Q6. Do you supply custom flare fittings?

Yes. We offer custom-machined brass flare fittings including non-standard tube ODs, special thread forms, dual-purpose configurations, and custom alloy grades. Please share your drawing or specification and our engineering team will provide a detailed quotation.

Why Choose Brass & Copper Parts for Flare Fittings?

Our state-of-the-art CNC machining facility ensures tight tolerances and consistent quality across every batch. With in-house thread gauging, hydrostatic pressure testing, and surface finish inspection, we deliver flare fittings that installers and engineers can trust. Our experienced technical sales team can help you select the correct fitting type, material grade, and size for your specific application.