What is a JIC Fittings?
JIC fittings, defined by the SAE J514 and MIL-DTL-18866 standards, are a type of flare fitting machined with a 37-degree flare seating surface.
JIC (Joint Industry Council) fittings are widely used in fuel delivery and fluid power applications, especially where high pressure (up to 10,000 psi) is involved.
JIC fittings are dimensionally identical to AN (Army-Navy) fittings, but are produced to less exacting tolerances and are generally less costly. （Content from JIC fitting Wikipedia）
How JIC Fittings Work
The JIC fittings consist of three components to make a Tubing assembly: body, nut, and sleeve.
JIC fittings rely on metal-to-metal contact between the finished surface of the fitting nose and the inside diameter of the flared tubing to make a seal. SSP takes great care in the manufacturing process to produce a flared nose surface that far exceeds published specifications. High-quality finishes reduce the likelihood of leakage due to irregularities in the flared tubing.
As the fitting nose and flared tubing are drawn together, they are supported by the fitting sleeve, which distributes the compressing load caused by the nut as it is threaded onto the fitting body during assembly. An installed SAE flared tube fitting system is easy to identify. The sleeve protrudes out the back of the nut. This extension provides the tubing with additional support and lessens the longitudinal load on the fitting nose.
SAE flared tube fittings are available for fractional and metric tubing. Metric assemblies are constructed with standard fractional bodies, and metric nuts and sleeves.
Advantages of Using JIC Fittings:
- They are readily available
- Offer a large variety of sizes, shapes, combinations, and materials
- Sizes are consistent with SAE fittings which makes them easily interchangeable and identifiable
- Can be disconnected and reconnected repeatedly without deformation (This is very useful in applications where equipment is frequently changed or swapped out. They are easy to maintain and install. Also, the combination of male a JIC fitting and female JIC swivel make orientation much easier.)
- The Simplicity and Affordability of Manufacturing JIC Fittings.
- JIC fittings perform exceptionally well in high- and low-temperature environments.
Disadvantages of Using JIC Fittings
- They have lower pressure rating than required in some instances (high vibration applications)
- The metal-to-metal sealing design limits them to hydraulic, fluid, and non-critical applications
- Susceptible to flare damage and cracking due to over-tightening
Applications of JIC Hose Fittings
JIC connectors are available in a wide range of sizes and styles, so they can be used in the following industries.
- In the military today, JIC fittings are primarily used in fuel delivery applications
- JIC fittings also see use in flexible plumbing systems joining together tubing in a hydraulic system.
- JIC fittings see heavy use in the aerospace industry by commercial airline manufacturers, NASA, and privately owned space companies.
Specifications of JIC Hose Fittings
| Thread Size | Assembly Torque (in-lb) | Assembly Torque (ft-lb) | Tube Connection FFWR | Swivel Nut or Hose FFWR |
|---|---|---|---|---|
| 2 | 35 – 45 | 2 – 4 | N/A | N/A |
| 3 | 65 – 75 | 5 – 7 | N/A | N/A |
| 4 | 130 – 150 | 11 – 13 | 2 | 2 |
| 5 | 165 – 195 | 14 – 16 | 2 | 2 |
| 6 | 235 – 265 | 20 – 22 | 1.5 | 1.25 |
| 8 | 525 – 575 | 43 – 47 | 1.5 | 1 |
| 10 | 650 – 750 | 55 – 65 | 1.5 | 1 |
| 12 | 950 – 1050 | 80 – 90 | 1.25 | 1 |
| 14 | 1200 – 1300 | 100 – 110 | 1 | 1 |
| 16 | 1400 – 1500 | 115 – 125 | 1 | 1 |
| 20 | 1900 – 2100 | 160 – 180 | 1 | 1 |
| 24 | 2250 – 2550 | 185 – 215 | 1 | 1 |
| 32 | 3000 – 3400 | 250 – 290 | 1 | 1 |
Other Questions About JIC Hydraulic Fittings
What is the difference between JIC and NPT?
JIC and NPT threads are two different thread options in system installation. JIC comes with a 37-degree flared that attaches to either a hose fitting or a flared tube.
How JIC fittings seal affects temperature rating?
JIC Fittings are available in stainless steel SS316, carbon steel, and brass material. Surface contamination is removed and the fitting surface protection is critical and important to enhance corrosion resistance. Each material works under different temperature ratings as below:
What are JIC fittings used for?
Although developed and produced to a lower standard, JIC and SAE fittings are nearly identical to AN-type couplings. These are used extensively in agricultural equipment, construction, heavy machinery, and automotive industries.
Can I combine AN and JIC couplings?
AN fittings are made to a much higher standard than JIC/SAE fittings. Also, AN fittings are much more expensive. Using these interchangeably is not recommended.
Hydraulic Fittings Manufacturer
We are a professional JIC hose fittings manufacturer and supplier, capable of producing and customizing various specifications of JIC hose fittings for you. If you need these products, please contact us!
