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Hydraulic Hose Fitting Size Chart: A Guide for Selecting the Right Fit

Hydraulic hose fitting size chart is a valuable tool for anyone working with hydraulic systems. It helps ensure you select the correct fitting for your specific hose and application.

hydraulic hose fitting sizes

hydraulic hose fittings dimensions

Hydraulic hose fitting sizes are designated by two main factors: the inner diameter (ID) of the hose they fit and the fitting type.

Hydraulic Hose Fitting Inner Diameter (ID):

This refers to the opening size of the hose that the fitting is designed to connect with. It’s typically indicated in inches (e.g., 1/4″, 3/8″, 1/2″) or millimeters (e.g., 6mm, 10mm, 12mm). You’ll find this information in hose sizing charts or directly on the hose itself.

Hydraulic Hose Fitting Type

There are various fitting styles, each suited for specific applications and offering advantages in terms of sealing, installation, or working pressure.

jic hydraulic hose fittings

JIC (Joint Industrial Council) hydraulic hose fittings

These JIC hydraulic hose fittings use a 37-degree cone seal for a tight connection and are popular for high-pressure applications.

npt hydraulic hose fittings

NPT (National Pipe Thread) hydraulic hose fittings

These NPT hydraulic hose fittings have tapered threads for sealing against a matching tapered surface. They are widely used and available in various sizes.

o ring hydraulic hose fittings

ORFS (O-Ring Face Seal) hydraulic hose fittings

These o-ring hydraulic hose fittings create a seal with an O-ring, offering good sealing performance and reusability.

1:4 bspp fitting

ORFS (British Standard Pipe Parallel) hydraulic hose fittings

A BSPP fitting, or British Standard Pipe Parallel fitting, is a type of pipe fitting used to create secure connections in plumbing systems.

hydraulic hose Fitting Size Chart

A hydraulic hose fitting size chart is a helpful tool that lists these two factors (ID and fitting type) along with additional specifications like:

  • Thread Size: This refers to the size and thread pattern on the fitting for screwing into a port or another fitting. Examples include NPTF (National Pipe Thread Dryseal) or BSPP (British Standard Pipe Parallel).
  • Material: The fitting’s material composition, such as steel, brass, or stainless steel, is crucial for compatibility with the fluid type and pressure within your system.
  • Pressure Rating: This indicates the maximum pressure the fitting can withstand safely. It’s vital to choose a fitting with a pressure rating exceeding your system’s operating pressure.

Finding Hydraulic Hose Fitting Size Charts:

  • Hydraulic hose and fitting manufacturers provide size charts on their websites or catalogs.
  • Online resources from hydraulics suppliers or industry publications may offer downloadable charts.

Important Tips:

  • Always refer to the specific manufacturer‘s chart for their product lines.
  • Ensure compatibility between the chosen fitting size, type, and your hose and system requirements.
  • If you’re unsure or need help selecting the appropriate fitting, consult a hydraulics professional.

Here’s a simplified table representing a typical hydraulic hose fitting size chart:

Hose Size (ID)Fitting TypeThread Size (Example)Material (Example)Pressure Rating (Example)
1/4″JIC1/4″ NPTFSteel3,000 PSI
3/8″NPT3/8″ BSPPBrass2,500 PSI
1/2″SAE1/2″ ORFSStainless Steel4,000 PSI


  • This table is for illustrative purposes only and doesn’t represent actual fitting specifications.
  • Thread size and material examples may vary depending on the fitting type and manufacturer.
  • Flange fittings typically don’t have a thread size listed as they bolt together.
  • Pressure ratings will vary depending on the specific fitting, hose, and material.

Remember, for accurate information, consult the size chart provided by the manufacturer of the specific hydraulic hose fittings you’re considering.

hydraulic hose Fittings Applications

Hydraulic hose fittings are employed in a wide range of applications that rely on fluid power transmission.

Construction and Heavy Machinery

  • Excavators: Hydraulic hose fittings are essential for operating excavator arms, buckets, and other attachments by ensuring fluid flow to hydraulic cylinders.
  • Loaders: They are crucial for powering the lift and tilt mechanisms of loaders.
  • Cranes: Precise control of crane movement relies on hydraulic systems and their corresponding fittings.


  • Tractors: Fittings are vital for operating tractor implements like plows, planters, and harvesters through hydraulic power.
  • Harvesters: They are essential for harvester functions like mower actuation and grain bin extension.
  • Irrigation Systems: Hydraulic-powered valves and sprinklers in irrigation systems utilize hose fittings.

Oil and Gas

  • Drilling: Drilling rigs utilize hydraulic systems with numerous hose fittings for various functions.
  • Extraction: Hydraulic power is used in extraction processes, and fittings ensure proper fluid flow.
  • Transportation: Pipelines rely on pumping stations with hydraulic systems that incorporate hose fittings.

Manufacturing and Industrial Equipment

  • Machine Tools: Fittings enable fluid flow to power machine tool functions like cutting, drilling, and shaping.
  • Presses: Hydraulic presses use fittings to deliver the necessary force for metal forming and stamping processes.
  • Material Handling Equipment: Forklifts and other material handling equipment rely on hydraulics and fittings for lifting and maneuvering capabilities.


  • Braking Systems: Anti-lock braking systems (ABS) employ hydraulics and fittings for proper functioning.
  • Power Steering Systems: Smooth steering control depends on hydraulic fluid flow facilitated by fittings.
  • Suspension Systems: Hydraulic suspension systems in some vehicles use fittings for height adjustment and shock absorption.
  • Hydraulic Lifts: These lifting mechanisms in trucks and other vehicles rely on hydraulic fittings for operation.

How to Measure Hydraulic Hose Fittings

how to measure hydraulic hose fittings

To measure hydraulic hose fittings, you need calipers to find:

  • Inner Diameter (ID): This is the hose size the fitting fits. Use calipers in OD mode for male fittings (threads outside) and ID mode for female fittings (threads inside).
  • Thread Size: Calipers give a rough idea, but a thread pitch gauge is ideal for precise measurement. Match the gauge teeth to the threads for size and type (e.g., NPT 1/2-14).

Measure Hydraulic Hose Fitting ID

Measure the Inner Diameter (ID):

  • Male Fitting: Use calipers in outside diameter (OD) mode. Squeeze the jaws around the base of the threads for a snug fit without deforming them. The measurement is the ID of the compatible hose.
  • Female Fitting: Switch calipers to inside diameter (ID) mode. Insert the jaws carefully into the opening and close them until they touch the threads firmly. The reading indicates the ID of the compatible hose.

Measure Hydraulic Hose Fitting Thread Size

Measure the Thread Size (Optional, but recommended for precise fit):

  • Calipers can provide an estimate of the thread diameter.
  • For accurate measurement and thread type identification, use a thread pitch gauge. Align the gauge’s teeth with the fitting’s threads. A snug fit with a specific gauge size indicates the thread type (e.g., NPT 1/2-14).
  • Refer to a thread identification chart to confirm the exact size and type based on the matching gauge.

Hydraulic Hose Fitting Size Chart

We are a leading manufacturer of hydraulic hose fittings. As a one-stop factory for your hydraulic hose needs, we offer a comprehensive selection of hydraulic hose fittings in various sizes and types to ensure compatibility with your specific application. Don’t hesitate to contact us today! Our hydraulics experts are happy to assist you in choosing the most suitable fittings for your project.

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