How Do I Identify the Proper Fittings for Hydraulic Hoses?

How Do I Identify the Proper Fittings for Hydraulic Hoses?

March 11, 2022

Hydraulic hoses are some of the most important components of hydraulic and pneumatic systems. They carry hydraulic fluid between different parts of the system. Hydraulic hoses are fairly complicated devices, as they contain several different components within them. The most important and most complex portion of a hydraulic hose is likely its fitting.

Each hydraulic hose needs to connect to its respective hydraulic device, and the fitting is the connection point. To find the correct fitting, you’ll likely need to consult a hydraulic fitting size chart. Below we’ll offer some assistance in finding the proper fitting for your hydraulic hose.


Hydraulic hose fittings come in two main types: reusable and permanent. Before consulting a hydraulic fittings chart, you must determine which type of fitting you’ll need. You can tell which fitting you’ll need by how you attach it. A permanent fitting is crimped and will thus require a crimping tool to hook it up. A reusable hydraulic hose fitting, on the other hand, can be connected to a hose simply by using a wrench and a vise.

Fitting ends and port connections

Once you determine which type of fitting you’ll need, you must figure out the correct port connection to pair with the accompanying hose connection. For this step, you’ll want to refer to a port connection and hose connection chart. One example is a four-bolt flange connection. This is compatible with both British standard pipe parallel (BSPP) thread and metric 60° cone tube coupling. The port and hose connection chart will outline successful connections you can make.


Since hydraulic hose fittings have several different utilities, they are available in a wide variety of sealing types. You’ll have to take this into consideration when trying to find the correct hydraulic hose fitting. The three most common types of hose fitting seal types are O-ring, mated angle and tapered threads. You’ll want to check charts on these, as there are a few different subtypes within each category.


Each hydraulic hose fitting will have a unique design. You’ll be required to find an O-ring’s precise position, the nose seat and the seat angle of any potential fittings. You should be able to roughly find the O-ring position and type of nose seat with a visual inspection, but you’ll need a seat angle gauge to correctly assess the seat angle. There are charts available online that should be able to help with this step.

Thread size

Finally, you’ll need to ascertain the thread size of your fitting. For assistance, you should consult a hydraulic fitting size chart. A thread gauge will be a useful tool to help with this process. Do keep in mind that the threads are measured in inches and may appear different depending on their respective shape and design.

Call about your hydraulic hose fittings today

Once you’ve used a hydraulic fittings size chart to help you figure out the proper fitting that you need, call us at Royal Brass Incorporated. We prioritize customer service, and we have a massive inventory of various hydraulic hose fittings. Call our experts to receive yours today!

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