Hydraulic systems require strong, leak-free connections to operate safely and efficiently under high pressure. Among the most trusted hydraulic connection standards used worldwide are 37 Degree JIC and AN fittings. These hydraulic hose fittings are known for their durability, reliable sealing performance, and compatibility across a wide range of industrial and mobile hydraulic systems.

Gear House Hydraulics offers a complete range of 37 Degree JIC/AN fittings, hydraulic adapters, hose fittings, and industrial hydraulic components designed for demanding applications.

What Are 37 Degree JIC / AN Fittings?

JIC stands for Joint Industry Council, while AN refers to Army-Navy fittings originally developed for military aerospace applications. Both use a 37-degree flare seating surface that creates a strong metal-to-metal seal between the male flare and female cone seat.

This sealing method allows hydraulic systems to maintain leak-resistant connections without requiring thread sealants or Teflon tape in most applications.

JIC and AN fittings are widely used because they offer:

• Excellent leak prevention
• High-pressure performance
• Easy installation and maintenance
• Strong vibration resistance
• Wide compatibility with hydraulic equipment

How 37 Degree Hydraulic Fittings Work

The sealing mechanism in JIC/AN fittings is based on a precision-machined 37-degree flare angle. When the male flare and female cone are tightened together, they form a secure mechanical seal capable of handling high-pressure hydraulic applications.

Unlike tapered pipe threads, the seal is created at the flare surface rather than the threads themselves. This design reduces leakage risks and allows fittings to be reused multiple times if properly maintained.

Difference Between JIC and AN Fittings

Although JIC and AN fittings share the same 37-degree flare design, there are slight differences.

JIC Fittings

JIC fittings are commonly used in industrial and hydraulic systems. They follow SAE J514 standards and are widely available in commercial hydraulic applications.

AN Fittings

AN fittings were originally developed for military aerospace systems and are manufactured to tighter tolerances. They are commonly used in aviation, racing, and performance automotive industries.

In many hydraulic applications, JIC and AN fittings are compatible because of their similar flare angle design.

Common Types of JIC / AN Hydraulic Fittings

Hydraulic systems require different fitting styles depending on routing, pressure, and installation needs.

Straight JIC Fittings

Straight adapters connect hydraulic components in a direct line and are commonly used in hose assemblies and tubing systems.

45° and 90° Elbow Fittings

Elbow fittings help redirect hydraulic flow while reducing hose stress and improving installation flexibility.

Tee and Cross Fittings

Tee and cross fittings allow hydraulic flow to branch into multiple directions within a hydraulic circuit.

Bulkhead Fittings

Bulkhead fittings pass hydraulic lines securely through panels or equipment walls while maintaining sealing integrity.

Swivel Fittings

Swivel fittings simplify installation and reduce hose twisting during assembly and operation.

Materials Used in JIC Hydraulic Fittings

Hydraulic hose fittings are manufactured using durable materials designed to withstand pressure, vibration, and harsh environments.

Common materials include:

• Carbon steel
• Stainless steel
• Zinc-plated steel
• Brass

Stainless steel JIC fittings are especially useful in marine, food processing, and corrosive industrial environments because of their excellent corrosion resistance.

Applications of 37 Degree JIC / AN Fittings

JIC and AN fittings are widely used in industries requiring reliable high-pressure hydraulic connections.

Common applications include:

• Construction equipment
• Agriculture machinery
• Mining hydraulics
• Aerospace systems
• Automotive performance systems
• Oil & gas equipment
• Industrial manufacturing
• Marine hydraulics
• Transportation equipment

Their high-pressure sealing capability makes them one of the most trusted fitting styles in hydraulic systems worldwide.

Benefits of Using JIC Hydraulic Hose Fittings

Leak-Free Performance

The 37-degree flare connection creates a strong metal-to-metal seal that minimizes leakage.

High Pressure Capability

JIC fittings perform reliably in medium- and high-pressure hydraulic systems.

Reusable Design

These fittings can often be disconnected and reused without damaging the sealing surface.

Easy Maintenance

Simple installation and removal reduce maintenance time and service costs.

Wide Compatibility

JIC fittings are commonly used across industrial, hydraulic, and automotive applications.

Why Choose Gear House Hydraulics for JIC / AN Fittings?

Gear House Hydraulics 37 Degree JIC/AN Fittings provides high-quality hydraulic hose fittings and adapters designed for durability and long-term performance.

The company offers:

• Premium hydraulic fittings and adapters
• Hydraulic hose assemblies
• Industrial-grade hydraulic components
• Technical support for fitting selection
• Emergency hydraulic services
• Solutions for construction, agriculture, manufacturing, and mining industries

With over 20 years of hydraulic industry experience, Gear House Hydraulics continues to support businesses with reliable hydraulic solutions.

Final Thoughts

37 Degree JIC / AN fittings remain one of the most dependable connection standards for hydraulic hose systems. Their metal-to-metal flare sealing design delivers excellent leak resistance, durability, and pressure handling for demanding industrial applications.

Whether you need elbows, tees, adapters, swivel fittings, or complete hydraulic hose solutions, choosing high-quality JIC fittings is essential for maintaining hydraulic system performance and reliability.

Explore professional hydraulic fitting solutions from Gear House Hydraulics to keep your hydraulic systems operating efficiently and safely.