Welcome to our newsletter about JIC and JIS hydraulic fittings! In this guide, we will explore everything you need to know about these two types of fittings, including their uses, benefits, and differences. Whether you’re a professional in the hydraulic industry or just getting started, this guide will provide you with valuable insights and information.

Section 1: What are JIC Fittings?

The Joint Industry Council (JIC) fitting has a long history in the hydraulic industry. It was first developed in the early 20th century to standardize hydraulic fittings used in the aircraft industry. At the time, there were many different types of fittings being used, which made it difficult to maintain and repair hydraulic systems. JIC fittings are characterized by their 37-degree flare angle, which creates a strong and reliable seal between the fitting and the hydraulic hose or tubing. This flare angle is designed to minimize leakages and provide a secure connection even under high pressure

Section 2: What are JIS Fittings?

JIS (Japanese Industrial Standard) fitting is a type of hydraulic fitting that is commonly used in Japan and other Asian countries. Like JIC fittings, JIS fittings are used to connect hydraulic hoses and tubes in a variety of applications, including industrial machinery, construction equipment, and agricultural machinery. JIS fittings are characterized by their 30-degree flare angle, which is slightly different from the 37-degree flare angle used in JIC fittings. This flare angle creates a reliable seal between the fitting and the hydraulic hose or tube, and helps to prevent leaks under pressure. JIS fittings come in a range of sizes, from small diameters used in low-pressure systems to larger sizes used in high-pressure applications. They are often made of steel or brass and can be either male or female fittings.

Section 3: Differences Between JIC and JIS Hydraulic Fittings

JIC (Joint Industry Council) and JIS (Japanese Industrial Standard) fittings are two different types of hydraulic fittings, each with its own unique characteristics and uses. Here are some of the key differences between these two types of fittings:

⦁ Flare Angle: The most significant difference between JIC and JIS fittings is the flare angle. JIC fittings have a 37-degree flare angle, while JIS fittings have a 30-degree flare angle. This difference in angle affects the way the fittings seal and connect to the hydraulic tubing or hose.

⦁ Thread Type: JIC fittings typically have Unified National Fine (UNF) threads, while JIS fittings have metric threads. This means that JIC fittings may require different tools and adapters than JIS fittings when installing or repairing hydraulic systems.

⦁ Standards: JIC fittings are governed by SAE (Society of Automotive Engineers) standards, while JIS fittings are governed by Japanese Industrial Standards. This means that the specifications and performance standards for JIC and JIS fittings may differ slightly.

Malone Specialty Inc.

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