Kingdaflex supplies high-quality inverted flare fittings designed to meet SAE standards for brake, fuel, and fluid systems.
Our fittings ensure secure metal-to-metal sealing, consistent performance, and reliable compatibility across automotive and industrial fluid transfer applications.
Male inverted flare fittings feature an external thread and a 45-degree inverted flare seat that seals directly against the flared tube end. They are commonly used to connect metal brake lines, fuel lines, and hydraulic tubing to ports or adapters. These fittings are compatible with SAE-standard steel, copper, and copper-nickel tubing, providing stable performance under vibration and pressure.
Female inverted flare fittings are designed with internal threads and a conical sealing surface to accept a flared male tube end. They are widely used in inline connections, brake system junctions, and fluid line extensions. Their design ensures consistent metal-to-metal sealing without the need for additional sealing materials, making them ideal for SAE-based automotive and industrial fluid systems.
Inverted flare to NPT adapters are used to transition between SAE inverted flare tubing connections and NPT threaded ports. These adapters allow seamless integration of brake or fluid lines into hydraulic manifolds, pumps, or industrial equipment. They provide flexibility in system design while maintaining secure sealing and compatibility across mixed-thread fluid systems.
Inverted flare fittings are manufactured according to SAE standards to match specific tubing outer diameters and thread dimensions. Selecting the correct size is essential to ensure proper sealing, thread engagement, and system safety. The table below provides a general reference for common inverted flare fitting sizes, corresponding tubing OD, and thread specifications.
| Inverted Flare Size | Compatible Tubing OD | Thread Size (SAE) | Typical Applications |
|---|---|---|---|
| 1/8″ | 1/8″ (3.18 mm) | 5/16″-24 | Instrument lines, low-pressure fluid lines |
| 3/16″ | 3/16″ (4.76 mm) | 3/8″-24 | Automotive brake lines |
| 1/4″ | 1/4″ (6.35 mm) | 7/16″-24 | Fuel lines, brake systems |
| 5/16″ | 5/16″ (7.94 mm) | 1/2″-20 | Hydraulic control lines |
| 3/8″ | 3/8″ (9.52 mm) | 5/8″-18 | Fluid transfer systems |
| 1/2″ | 1/2″ (12.7 mm) | 3/4″-16 | Industrial fluid lines |
| 5/8″ | 5/8″ (15.88 mm) | 7/8″-14 | Heavy-duty fluid applications |
Note: Dimensions are based on common SAE inverted flare standards. Custom sizes, materials, and thread configurations are available upon request.
1/2 inch inverted flare fitting is a crucial component used to connect hydraulic tubing in systems like brakes, power steering, and fuel lines. It creates a leak-proof seal by flaring the tubing inward. Kingdaflex offers a wide range of high-quality inverted flare fittings to meet your specific needs. Trust Kingdaflex for reliable and durable hose fitting solutions.
Inverted flare fittings are widely used in automotive brake line systems, providing secure metal-to-metal sealing capable of withstanding high pressure, vibration, and temperature fluctuations in braking applications.
These fittings are commonly applied in fuel lines for gasoline and diesel systems, ensuring leak-resistant connections and stable fluid flow under varying operating pressures and engine conditions.
Inverted flare fittings are suitable for low to medium pressure hydraulic control lines, offering reliable sealing performance in equipment where consistent fluid transfer and vibration resistance are required.
Kingdaflex inverted flare fittings are manufactured in strict accordance with SAE standards to ensure precise thread accuracy and reliable sealing performance.
We offer consistent machining quality, stable material selection, and dimensional control for dependable system compatibility.
With bulk supply capability, OEM customization options, and one-stop sourcing for hoses and fittings, Kingdaflex supports global customers across automotive and industrial fluid transfer markets.
An inverted flare fitting is used to connect metal tubing in fluid transfer systems where a secure, leak-resistant seal is required. It is commonly applied in automotive brake lines, fuel systems, and hydraulic control lines. The fitting creates a metal-to-metal seal by compressing a flared tube end against a conical seat, ensuring reliable performance under pressure and vibration without additional sealing components.
Yes, inverted flare fittings are manufactured according to SAE (Society of Automotive Engineers) standards, most commonly SAE J512 and related specifications. These standards define the 45-degree inverted flare angle, thread dimensions, and sealing method. SAE compliance ensures compatibility with standard tubing sizes and consistent performance across automotive and industrial fluid systems using SAE-based components.
Inverted flare fittings are widely used in automotive brake line systems due to their strong metal-to-metal sealing capability. They are designed to handle the high pressure and vibration typical of brake applications. When properly installed with compatible steel or copper-nickel tubing, inverted flare fittings provide reliable, long-term sealing performance and are commonly specified in SAE brake system designs.
Inverted flare fittings are available in a range of standard SAE sizes to match common tubing outer diameters. Typical sizes include 1/8″, 3/16″, 1/4″, 5/16″, 3/8″, 1/2″, and up to 5/8″. Each size corresponds to specific thread dimensions and tubing compatibility, allowing proper selection for automotive, hydraulic, and industrial fluid transfer systems.
Inverted flare fittings do not require thread sealant or tape because sealing occurs at the flared tube end, not the threads. The threads provide mechanical strength only, while the metal-to-metal contact between the flare and the fitting seat creates the seal. Applying sealant is generally unnecessary and may interfere with proper installation or torque in SAE inverted flare connections.