JIC UNF straight fittings for power hydraulics

JIC UNF straight fittings are connection components used in power hydraulic systems where the JIC standard is utilized. Characteristic of this system are UNF threads and a 37° cone seal. Such a solution is commonly found in hydraulic hoses, mobile machinery, industrial equipment, and installations using JIC standard connections.

In this category, you will find straight hydraulic fittings designed for making JIC UNF threaded connections. Individual variants differ primarily in thread size, so parameters of both connected elements should be carefully checked before ordering.

How does a JIC connection with UNF thread work?

In JIC connections, the thread is responsible for the mechanical tightening of the mating components, while the actual sealing surface is located on the 37° cone. For this reason, when selecting a fitting, it is not enough to determine only the thread diameter. You must also ensure that the mating component uses the JIC standard and the appropriate sealing surface.

The JIC connectors used in this product group are manufactured to ISO 8434-2 / SAE J514 standards. :contentReference[oaicite:0]{index=0}

Where are JIC UNF straight fittings used?

• in power hydraulic systems,
• in hydraulic hoses terminated with JIC fittings,
• in agricultural and construction machinery,
• in mobile hydraulics,
• in industrial machines and equipment,
• in the construction, modernization, and repair of hydraulic installations.

How to select a JIC UNF fitting?

The most important stage is the correct identification of the thread. In the case of JIC connectors, UNF threads are used, so it is worth checking both the thread diameter and its pitch. Then, verify the type of sealing surface and the size of the other side of the fitting.

An element should not be selected solely based on an approximate diameter measured with a caliper. Threads of different standards can have similar dimensions, but this does not mean they are mutually compatible.

JIC fittings vs. other hydraulic connection standards

JIC UNF is one of several connection systems used in power hydraulics. Depending on the machine design, you may also encounter metric threads, BSP, NPT, or ORFS connections. If you are modernizing an installation or are unsure which standard is used in the machine, it is worth identifying both the thread and the sealing method before purchase.

Other variants can be found in the category straight hydraulic fittings BB, which includes metric, BSP, NPT, and ORFS versions among others. :contentReference[oaicite:1]{index=1}

What to look for before purchasing?

• JIC connection standard,
• UNF thread size,
• type and size of the thread on both sides of the fitting,
• compatibility of sealing surfaces,
• operating parameters of the specific variant,
• compatibility with the hose or installation component.

The operating pressure should always be checked for the specific product. One value should not be assumed for all JIC UNF fittings, as parameters may vary depending on size and design.

FAQ - JIC UNF straight fittings

What thread is used in JIC fittings?

UNF threads are used in the JIC standard. When identifying a connection, check the thread diameter and pitch and confirm the presence of the appropriate sealing surface.

What cone does a JIC connector have?

A standard JIC connection utilizes a 37° sealing surface.

Does a UNF thread always mean a JIC connection?

No. The thread dimension and type alone are not enough to correctly identify a connector. The design and sealing surface of the mating components must also be checked.

How to order the correct JIC fitting?

Before purchasing, check the thread designation and size as well as the parameters of both sides of the connection. If identification is problematic, it is advisable to take an accurate thread measurement and compare it with the technical data of the product.