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Finding the right fit for fuel and Hydraulid Repair Near Me hydraulic systems can be challenging due to the lack of a universal industry standard and regional variations. Other standards like AN (Army-Navy), JIS, and Komatsu are also prevalent in various tools and machinery. It’s vital to understand these standards when selecting hydraulic fittings, as each is made with specific dimensions and tolerances. Incorrect choices can lead to loose connections, leaks, and hydraulic failures.


All these fittings share a common purpose: they dictate how a Hydraulid Repair Near Me component connects and seals with other hydraulic parts such as pipes, hoses, and valve blocks. The seal is formed by the metal-to-metal contact when compatible fittings are joined. Standards differ in aspects like internal diameter, thread size, flare angle, and thread orientation (parallel or tapered).


  • AN vs. JIC: AN fittings are similar to JIC but are made to stricter tolerances for military use.
  • JIS and Komatsu vs. JIC: While JIS and Komatsu resemble JIC fittings, they feature a 30° flare angle (JIC has 37°), with JIS using BSP thread sizing and Komatsu metric sizing.
  • SAE vs. JIC: JIC’s thread size is based on SAE standards, allowing compatibility with SAE 45° flare fittings, though caution is advised due to differing flare angles.


JIC fittings are versatile, making them popular in hydraulics and automotive industries. They come in various multi-standard connections like unions, pipe connectors, and bulkhead fittings. Available in diverse forms (elbows, reducers, expanders, etc.), they’re widely stocked in materials like carbon and stainless steel, brass, and nickel-copper alloys, catering to custom needs in cost, resistance, temperature, and pressure.


In such cases, O-ring sealed fittings, which can handle higher pressures due to O-ring compression, are more suitable.

JIC (Joint Industry Council) fittings, specified by SAE J514, are 37-degree flare compression fittings with parallel threads, commonly made from nickel alloys, brass, carbon, and stainless steel.

Widely used in fluid power systems, Hydraulid Repair Near Me JIC hydraulic connections feature both male and female components with 37-degree seats, forming a seal through the contact between the male flare and female coned seat. This mechanical connection comprises three elements: the fitting, flare nut, and sleeve.

Benefits of JIC Fittings:

  • Wide availability
  • Extensive range of sizes, shapes, combinations, and materials
  • Compatibility and easy identification due to size consistency with SAE fittings
  • Suitable for high-temperature applications due to the lack of an O-ring
  • Allows for easy disconnection and reconnection without deformation, facilitating maintenance, installation, and orientation with male JIC fittings and female JIC swivels

Drawbacks of JIC Fittings:

  • Sometimes inadequate for high-pressure or high-vibration applications
  • Limited to hydraulic, fluid, and non-critical applications due to the metal-to-metal seal
  • Risk of flare damage and cracking from over-tightening

Flared Fittings in Comparison:

Flared fittings, especially suitable for thin to medium wall tubing, offer distinct design and performance advantages over pipe fittings. They are usually the top choice in most hydraulic powered systems, and most especially in the armed forces and space travel, due to their low to medium applications of pressure. 

 SAE 37° single flare is standard, requiring adherence to SAE tube wall thickness specifications for proper fitting.


Distinguishing Hydraulid Repair Near Me JIC from SAE 45-Degree Flare Fittings:

JIC fittings can be confused with SAE 45-degree flare fittings, as some sizes share thread dimensions. It’s important to accurately measure seat angles for correct identification.

JIC vs. AN (Army Navy) Fittings:

JIC fittings are often mistaken for AN fittings. While dimensionally identical, AN fittings adhere to stricter military standards and cover a broader range of sizes. As a result, JIC and AN fittings are not functionally interchangeable, necessitating accurate identification for a secure, leak-resistant connection.


Is there a difference between Hydraulid Repair Near Me JIC and AN hydraulic fittings? This question is often raised in the hydraulics industry, with both terms frequently used interchangeably. Air-Way has explored the relationship between JIC and AN fittings to clarify any confusion.

Background of AN Fittings:

AN, which stands for Air Force – Navy Aeronautical Design Standards (also known as “Army Navy”), is primarily used in U.S. Military aviation. These fittings adhere to stringent performance criteria suitable for aeronautical applications.  In the 1960s, the market saw an influx of various 37° flare fittings claiming to meet the AN standard, complicating matters for users.

The Role of JIC:

To resolve this confusion, the Joint Industries Council (JIC) standardized these 37-degree fittings, creating the JIC standard, which is similar to the AN fitting but with slightly lower thread quality. This JIC standard was later adopted by SAE as well. It’s noteworthy that in most instances, AN and JIC specifications are not commonly used today.

General Consensus:

The hydraulic industry generally considers JIC (or SAE) 37-degree fittings to be interchangeable with AN fittings. However, JIC fittings are not suitable for military aviation or aerospace applications. Instead, they are more commonly used in agricultural, construction, heavy machinery, and material handling equipment. JIC/SAE adapters serve as a cost-effective alternative to true AN fittings.

Key Differences:

Notable differences include the thread design—AN fittings feature a “J” thread with a larger root radius and tighter Class 3 tolerance, enhancing fatigue and shear strength. Additionally, the material requirements for each standard vary significantly. Despite these differences, industrial JIC/SAE J514 fittings made by Air-Way meet all specified qualification requirements and are much more economical to produce.


Frequently Asked Questions:

What is the meaning of JIC?

  • JIC refers to the Joint Industries Council, known for standardizing industrial-use fittings. These specific fittings are known as compression couplings and have  a 37 degree flared seat that facilitates both male and female connectivity. 

What does AN signify?

  • AN represents Air Force – Navy Aeronautical Design Standards, a designation used for specific types of fittings.

Is it possible to use AN and JIC couplings together?

  • A lot more goes into the manufacturing process of AN fittings and they require a higher list of specifications than JIC. As a result, they can be a bit more expensive. Therefore, it’s generally not advisable to use AN and JIC fittings interchangeably.

What applications are AN fittings used for?

  • AN (Army-Navy) fittings are predominantly used by the U.S. military, weapons manufacturers, and in aviation, both in the civilian sector as well as the military world.