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Straight Fitting BB BSP 5/8"

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Manufacturer: HYDRON hydraulika siłowa (go to products)

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Straight Fitting BB BSP 5/8" 315 bar

Straight Fitting BB BSP 5/8" is a steel hydraulic connector equipped with two identical BSP 5/8" male threads. It is used for directly connecting two installation components with compatible BSP connections. Since both ends have the same size, the fitting does not reduce the diameter.

The element features a 60° sealing cone and is designed for use in power hydraulics systems. The body is made of free-cutting steel, and the surface is protected with zinc plating with white passivation. The maximum working pressure for this model is 315 bar, and the temperature range is from -20°C to +120°C.

Technical parameters of the BB BSP 5/8" fitting

product type: straight hydraulic fitting BB,
type: straight fitting / hydraulic nipple,
thread 1: BSP 5/8" male,
thread 2: BSP 5/8" male,
BSP 5/8" thread dimension: 22.6-22.9 mm external / 20.6-21.0 mm internal,
sealing cone angle: 60°,
working pressure: 315 bar,
working temperature: from -20°C to +120°C,
material: free-cutting steel,
surface protection: zinc plating with white passivation,
medium: hydraulic oil,
purpose: connecting hydraulic installation elements,
designation according to Rastelli-Raccordi: 34.69.10.10,
designation according to Vitillo: ANGG1010,
alternative designation: 1B-10 / XG 5/8".

BSP 5/8" hydraulic nipple with two male threads

The designation BB indicates a fitting with male threads on both sides. In this model, both connections are made in the BSP 5/8" size, allowing the element to create a straight connection between two compatible hydraulic system parts.

The fitting can be used when building new installations, repairing existing systems, and upgrading machines. A single compact body allows connecting two components without the need for an additional reducer.

You will find other diameters and reducing variants in the BSP straight inch fittings category.

How to identify a BSP 5/8" thread?

The BSP 5/8" designation is a nominal value and does not directly correspond to the actual external thread diameter. According to the product parameters, the BSP 5/8" male thread has a diameter of approximately 22.6-22.9 mm.

If you get a result around 22.7 mm when measuring with a caliper, this may indicate BSP 5/8". However, for a positive identification, you should also check the thread pitch and the design of the sealing surface.

BSP 5/8" is a less common size

The BSP 5/8" thread occurs less frequently in hydraulics than the popular 1/4", 3/8", 1/2", or 3/4" sizes. Therefore, when replacing an old component, it is especially important to make an accurate measurement rather than selecting a fitting solely based on appearance.

An external diameter of approximately 22.6-22.9 mm is one of the most important clues for identifying this size. It is also worth checking the thread pitch with a thread pitch gauge.

Why does BSP 5/8" not have a 15.88 mm diameter?

A direct conversion of 5/8 inch yields about 15.88 mm; however, this is not the actual external diameter of the BSP 5/8" thread. BSP pipe thread designations are nominal.

For this fitting, the external diameter is approximately 22.6-22.9 mm. Directly converting the inch value to millimeters is therefore one of the most common reasons for incorrectly selecting hydraulic fittings.

60° sealing cone

The fitting uses a 60° sealing cone. Therefore, when selecting a mating component, you must check not only the nominal BSP 5/8" size, but also the design of the surface responsible for the tightness of the connection.

This is particularly important in high-pressure hydraulics. The ability to mechanically screw two parts together does not mean they form a proper hydraulic connection. The thread and the sealing surface must be compatible with each other.

Working pressure 315 bar

The maximum working pressure for the presented fitting is 315 bar. This parameter allows the element to be used in many typical power hydraulics systems, provided that all other installation components are correctly selected.

The maximum pressure of the entire system is always limited by the component with the lowest permissible value. You should therefore also check the parameters of the hoses, fittings, quick couplings, valves, manifolds, and other armatures.

If you are completing an entire connection, also check the crimped hydraulic hoses available in the HYDRON offer.

Free-cutting steel protected with zinc plating

The fitting body is made of free-cutting steel. The surface is protected with zinc plating with white passivation. This is a widely used solution in steel fasteners intended for typical power hydraulics systems.

The material should always be selected for the actual operating conditions. If the installation will work in an environment requiring increased corrosion resistance, it is worth considering stainless steel versions.

For such applications, also check out stainless steel straight fittings.

Working temperature from -20°C to +120°C

For the BB BSP 5/8" fitting, the specified working temperature range is from -20°C to +120°C. Hydraulic oil is specified as the medium in the product description.

When determining the permissible temperature for the entire installation, you should also check the hoses, seals, fittings, and valves. Each of these components may have its own temperature limits.

Where is the BSP 5/8" fitting used?

The fitting can be used wherever a straight connection of two hydraulic components with matching BSP 5/8" ports is required.

power hydraulics systems,
agricultural machinery,
orchard machinery,
forestry machinery,
construction machinery,
industrial equipment,
oil installations,
repairs of hydraulic systems,
modernization of machinery and equipment.

BSP 5/8" fitting or a reducer?

This model has BSP 5/8" on both sides, making it a classic straight fitting that does not change the connection diameter.

If one of the connected elements has a different thread size, a reducing version must be used. The HYDRON offer includes, among others, variants that allow transitioning from BSP 5/8" to other popular diameters.

Replacement designations for the BSP 5/8" fitting

When searching for a replacement part, symbols used by various manufacturers can be helpful. For the presented variant, the HYDRON sheet provides:

Rastelli-Raccordi: 34.69.10.10,
Vitillo: ANGG1010,
type designation: 1B-10,
alternative designation: XG 5/8".

However, when choosing a replacement, you should compare the full technical parameters of the element, not just its catalog symbol.

How to correctly select a BSP 5/8" fitting?

Before ordering, it is worth checking both elements to be connected. For the presented model, the basic selection criteria are:

first side: BSP 5/8" male,
second side: BSP 5/8" male,
external thread diameter: approx. 22.6-22.9 mm,
sealing system: 60° cone,
working pressure: maximum 315 bar,
working temperature: from -20°C to +120°C,
material: free-cutting steel,
protection: zinc plating with white passivation.

For the 5/8" size, it is worth verifying the thread particularly carefully, as it is less common than BSP 1/2" and 3/4". Caliper measurement and thread pitch inspection significantly reduce the risk of incorrect selection.

Selecting a hydraulic hose for BSP 5/8"

The connection size alone is not enough to properly assemble a complete hydraulic hose. You must also determine the inner diameter of the hose, required working pressure, hose length, working temperature, and the type of fittings.

To prepare the appropriate configuration, you can use the HYDRON hydraulic hose configurator, which allows the selection of a hose and end fittings for a specific machine or installation.

What to watch out for during assembly?

Before making a connection, check the condition of both threads and sealing surfaces. They should be clean and free of mechanical damage.

If unusually high resistance appears during the first turns, do not tighten the fitting forcefully. This may mean using a different size, pitch, or an incompatible thread standard.

Hydraulic fittings at HYDRON

At HYDRON, there is a wide selection of hydraulic fittings intended for the construction, repair, and modernization of power hydraulics systems. The offer includes BSP, BSPT, JIC/UNF, ORFS, NPT connections, and various metric standards.

Frequently Asked Questions

What threads does the fitting have?

The fitting has two identical BSP 5/8" male threads.

Is this a reducing fitting?

No. Both sides have the same BSP 5/8" size, so the fitting is used to simply connect two compatible elements.

What is the maximum working pressure?

The maximum working pressure stated for the product is 315 bar.

What material is the fitting made of?

The body is made of free-cutting steel, and the surface is protected with zinc plating with white passivation.

What sealing cone is used?

According to the product description, the fitting has a 60° sealing cone.

What is the diameter of the BSP 5/8" thread?

For the BSP 5/8" male thread, the product sheet indicates approximately 22.6-22.9 mm.

Does BSP 5/8" have a diameter of 15.88 mm?

No. The 5/8" designation is nominal. The actual external thread diameter in this product is approximately 22.6-22.9 mm.

What is the working temperature range?

The temperature range specified for the fitting is from -20°C to +120°C.

What medium is specified for the product?

Hydraulic oil is indicated as the medium in the product description.

Is BSP 5/8" a popular size?

It is found less frequently than BSP 1/4", 3/8", 1/2", or 3/4". Therefore, it is worth checking the thread diameter and pitch particularly carefully before purchasing.

Can this fitting be used in an installation operating at 300 bar?

Yes, provided that all other installation components are also rated for such pressure. The maximum working pressure of this fitting is 315 bar.

What catalog designations help find a replacement?

The product sheet lists the designations 34.69.10.10, ANGG1010, 1B-10, and XG 5/8".

Can the fitting be selected solely based on a caliper measurement?

No. A measurement of approximately 22.6-22.9 mm is an important clue, but you must also check the thread pitch and the design of the sealing surface.

What should I do if I'm not sure if I have a BSP 5/8"?

It is best to measure the external thread diameter, check its pitch, and compare the existing component with the machine documentation or a thread gauge. In case of doubt, it is worth using HYDRON technical support before ordering.