4 Steps to Identify Correct Hydraulic Hose Fittings

Hydraulic systems are the backbone of various heavy-duty applications, from construction equipment to automotive machinery. A key part to these systems are the hydraulic hose fittings which create a secure connection. With many options available, selecting the right hydraulic hose fittings can be a overwhelming task.

TT Weber’s guide will assist you in identifying the most suitable fittings for your hydraulic hose assemblies.

Key Takeaways

  • Distinguishing between reusable and permanent hydraulic hose fittings is key for installation and maintenance.
  • The design of the fitting ends, port connections, and sealing methods play a role in determining compatibility and function.
  • Proper identification of fitting designs can save costs, reduce downtime, and increase the longevity of your equipment.

Reusable or Permanent?

The first consideration when looking at hydraulic hose fittings is whether you require reusable or permanent types. Both have their advantages:

  • Reusable Fittings: As the name implies, these can be reused. Typically, they’re preferred for emergency repairs, allowing customers to create custom-length hydraulic hose assemblies on-the-spot. While they can be convenient, they’re not always recommended for high pressures applications due to potential wear and tear.
  • Permanent Fittings: These are commonly crimp fittings, made to provide a secure and lasting connection. Once installed, they’re not meant to be detached or reused. They’re good for high pressures and offer a more consistent seal, preventing contaminants from entering the system.

Look at Fitting Ends & Port Connections

The ends of the hydraulic hose fittings are critical for a proper connection with the equipment. Different machinery will require various types of fitting ends. Here are the key factors to consider:

  • Thread Size and Type: This is key for compatibility. Fittings can come in metric, BSP, JIC, or other standards. Knowing the thread type will assist in a seamless installation.
  • Orientation: Depending on the hose and equipment layout, you might need straight, 45-degree, or 90-degree angled fittings.
  • Port Connections: Whether you’re looking at parker adapters or other brands, you need to identify the right port connection. This ensures a tight and leak-free connection, vital for the efficient operation of your hydraulic equipment.
Port ConnectionsHose Connections
NPT/NPTF37⁰ Flare
BSPT (JIS-PT)30⁰ Flare (Metric)
Metric Taper45⁰ Flare
SAE Straight Thread24⁰ Flareless (SAE)
ISO 614924⁰ Flareless (DIN)
JIS-B235130⁰ Flare (BSPP)
DIN MetricO-Ring Face Seal (ORFS)
BSPP (JIS-PF)60⁰ NPSM Swivel
4-Bolt Flange60⁰ Cone (BSPP)
60⁰ Cone (Metric)

Identify Sealing Method

Sealing is essential to prevent leaks, corrosion, and the entry of contaminants into the hydraulic system. There are various methods:

  • Mated Angle: SAE 45° or JIC 37° is one example of a mated angle. Angle seat fittings have straight or parallel threads for sealing. When the male and female counterparts are threaded together a seal is formed when the two mating angle seats are joined together.
Mated angel seal
  • O-ring Seal: These fittings utilize an o-ring, placed in a groove to create a seal. They’re excellent for high pressures and provide a more consistent seal.
Oring Seal
  • Tapered Threads: Male and female are the two types of taper thread fittings. Male fitting threads are on the outside, while female threads are on the inside.
tapered thread seal

What’s the Fitting Design?

Different designs serve different purposes. Here’s a brief overview:

  • Crimp Fittings: As discussed, these are permanent fittings where the hose is placed over the fitting and is crimped into place. This design is stock-standard for most hydraulic hose assemblies.
  • Push-On Fittings: These are typically used with specific hoses. The hose is pushed onto the fitting, and a clamp or crimp might be used to secure it further.
  • Flange Fittings: Commonly used in high-pressure applications, they have a flange at the end, allowing for a secure connection.
  • Barbed Fittings: These have ridges, or ‘barbs’, which grip onto the inside of the hose. They’re secured with a clamp or ferrule.
  • Adapters: Sometimes, you might need to connect two different types of fittings or hoses. Adapters serve this purpose, ensuring compatibility between varying components.

When you shop for hydraulic hose fittings, always check for your needed requirements. Our shops have a wide stock and can serve all customer needs.

A hydraulic hose fitting guide.


Hydraulic hose fittings are key components in any hydraulic system. Being able to identify and select the correct one for your hydraulic system can save money and extend it’s lifespan.

Whether you’re replacing old fittings, setting up new hydraulic hose assemblies, or ordering in bulk, understanding the difference between reusable and permanent fittings, recognizing fitting ends, determining the correct sealing method, and identifying the fitting design is vital.

Always make sure that you source your fittings from reputable suppliers, and when in doubt, consult experts or contact customer support to assist in making the right choice. Proper research, combined with understanding your application’s requirements, will ensure that your hydraulic systems operate efficiently and safely.

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