Hydraulic Fittings FAQ
What is a hydraulic fitting?
A hydraulic fitting is a connector that joins hoses, tubes, and components in a hydraulic system to carry pressurized fluid without leaking. They come in many thread and sealing standards.
What are hydraulic fittings made of?
Hydraulic fittings are most commonly made from carbon steel, stainless steel, or brass, with stainless chosen for corrosion resistance and brass for lower-pressure or specialty uses. Material choice depends on the environment and pressure.
How do I identify a hydraulic fitting?
Identify a hydraulic fitting by its thread type, thread size, sealing style (flare, o-ring, or tapered), and gender. A thread gauge and calipers make identification accurate.
What is the difference between hydraulic and pneumatic fittings?
Hydraulic fittings handle high-pressure liquid and are built heavier, while pneumatic fittings handle lower-pressure compressed air and are typically lighter. They are generally not interchangeable.
What are hose end fittings?
Hose end fittings attach to the ends of hydraulic hoses to connect them securely to equipment and other components. They're available in permanent crimped and reusable field-attachable styles.
What are the types of hose end fittings?
Common hose end fitting types include JIC, NPT, ORFS, and BSP, in both permanent crimped and reusable field-attachable designs. The right type depends on your hose and connection port.
What is a JIC fitting?
A JIC fitting is a hydraulic connector that seals with a 37-degree flare and metal-to-metal contact, and it's widely used across hydraulic equipment. JIC stands for Joint Industry Council.
What are the most common types of hydraulic fittings?
The most common hydraulic fittings include JIC (37-degree flare), NPT, BSPP, and ORB, each built to a different sealing standard. JIC remains the most widely used because so much legacy equipment is built around the 37-degree flare.
What are the best fittings for high-pressure hydraulic systems?
Forged stainless steel fittings are a top choice for high-pressure hydraulic systems because they resist deformation and corrosion under sustained load. They outperform cast or carbon steel where reliability matters most.
Which hydraulic fittings last the longest?
Stainless steel hydraulic fittings last the longest in demanding conditions because their chromium oxide layer resists corrosion from moisture, salt, and chemicals. In dry, controlled environments carbon steel can be a lower-cost alternative.
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