37° Flare (JIC) Fittings
37° Flare (JIC) Female Connector
Straight 37° flare (JIC) female connector for joining flared tubing to a male NPT threaded connection. Available in a wide range of tube and female-thread sizes for hydraulic and industrial fluid systems.
Specifications
- Series
- JFC Series
- Connection
- 37° Flare Tube × Female NPT
- Flare Angle
- 37°
- Tube O.D.
- 1/8 to 2 in.; metric tube O.D. options available by configuration
- Female-Thread Option
- NPT
- Configuration
- Straight Female Connector
- Standard Basis
- SAE J514 / ISO 8434-2
- Standard Material
- 316 Stainless Steel
Overview
The JFC Series 37° Flare Female Connector provides a straight transition between a 37° flared tube connection and a male NPT threaded connection.
On the flare side, tightening the nut clamps the flared tube against the 37° fitting seat, creating a metal-to-metal sealing interface between the mating flare surfaces.
The female NPT end provides the pipe-thread connection to the corresponding male threaded component or port. Tube O.D. and female-thread size are selected according to the required tube-to-thread transition.
Key Features
- Straight tube-to-thread transition
- 37° flare tube connection
- Female NPT pipe-thread connection
- Metal-to-metal sealing at the 37° flare interface
- Multiple tube O.D. and female-thread size combinations
- Fractional and metric tube O.D. options
- 316 stainless steel as the standard material
- Based on the SAE J514 / ISO 8434-2 37° flare fitting system
Engineering Specifications
Parameter | Specification |
|---|---|
Fitting Type | Female Connector |
Tube Connection | 37° Flared Tube |
Port Connection | Female NPT Thread |
Flare Angle | 37° |
Tube O.D. Range | 1/8 to 2 in.; metric options depending on configuration |
Female-Thread Type | NPT |
Configuration | Straight |
Standard Basis | SAE J514 / ISO 8434-2 |
Standard Material | 316 Stainless Steel |
Connection & Size Options
JFC Series Female Connectors are available in multiple tube O.D. and female NPT thread-size combinations.
The 37° flare connection uses the corresponding flare thread for the selected tube O.D. Common fractional configurations include:
Tube O.D. | 37° Flare Thread |
|---|---|
1/8 in. | 5/16-24 |
3/16 in. | 3/8-24 |
1/4 in. | 7/16-20 |
5/16 in. | 1/2-20 |
3/8 in. | 9/16-18 |
1/2 in. | 3/4-16 |
5/8 in. | 7/8-14 |
3/4 in. | 1 1/16-12 |
7/8 in. | 1 3/16-12 |
1 in. | 1 5/16-12 |
1 1/4 in. | 1 5/8-12 |
1 1/2 in. | 1 7/8-12 |
2 in. | 2 1/2-12 |
Female NPT connections are available in multiple sizes depending on the selected tube O.D. Available tube-to-thread combinations vary by configuration.
Sealing Principle
The 37° flare side seals at the metal-to-metal interface between the fitting seat and the inside surface of the properly prepared tube flare.
The female NPT connection is a separate pipe-thread interface and should be assembled using a sealing method appropriate for the mating NPT connection and application.
The flare sealing surfaces should be clean and free from scratches, cracks, burrs or other damage that could interfere with sealing performance.
Working Pressure
Working pressure depends on fitting size, tube material, tube wall thickness, operating temperature and the complete connection configuration.
Representative working pressures for the 37° flare fitting system are:
Tube O.D. / SAE Size | Working Pressure |
|---|---|
1/8 to 3/8 in. / -2 to -6 | Up to 5000 psi / 345 bar |
1/2 in. / -8 | Up to 4500 psi / 310 bar |
5/8 to 3/4 in. / -10 to -12 | Up to 3500 psi / 241 bar |
7/8 to 1 in. / -14 to -16 | Up to 3000 psi / 207 bar |
1 1/4 in. / -20 | Up to 2500 psi / 172 bar |
1 1/2 in. / -24 | Up to 2000 psi / 138 bar |
2 in. / -32 | Up to 1500 psi / 103 bar |
Pressure capability of the complete assembly is limited by the lowest-rated component or connection. The selected tube, flare connection and NPT connection should therefore be evaluated together for the intended operating conditions.
Material
Standard Material: 316 Stainless Steel
316 stainless steel is used for corrosion resistance and mechanical performance in hydraulic and industrial fluid systems.
Material requirements should be specified with the application, fluid medium and operating conditions when requesting a quotation.
Typical Applications
37° Flare (JIC) Female Connectors are commonly used in:
- Hydraulic power units
- Industrial machinery
- Mobile hydraulic equipment
- Machine tools
- Pumps and hydraulic control systems
- Test equipment
- Process and utility equipment
- Hydraulic tube installations requiring a straight tube-to-male-thread transition
Selection & Ordering Information
To specify the required 37° Flare (JIC) Female Connector, provide:
- Tube O.D.
- Female NPT thread size
- Material
- Tube material and wall thickness
- Operating pressure and temperature
- Fluid or process medium
- Quantity
Existing part numbers, drawings, BOMs, thread specifications or product references can also be provided for product matching and quotation review.
