BSP Hydraulic Fitting Manufacturer in China

❖ Consistent Batch Quality

❖ Mixed-SKU Ordering

❖ Repeat Supply Planning

❖ Technical Specification Verification

Product List

Topa supplies a range of BSP hydraulic fittings and adapters for distributors, hose shops, and OEM applications. Available configurations include BSPP and BSPT connections, with options selected to match the fitting type and system requirements. Because BSP thread form alone does not define the sealing interface, confirm the complete connection details, including thread designation, mating end, and seal type, when specifying a fitting.

BSP Hydraulic Fitting Video

In this video, you will see a variety of BSP hydraulic fittings from Topa, covering everything from right angles and tees to a wide range of customized styles. These fittings are CNC machined with high precision to ensure that each one is a perfect fit for the customer. The video will take you through the construction of each type in detail, helping you to quickly find the right hydraulic fitting for your system.

Whether it’s industrial machinery, agricultural equipment, construction and transportation, Topa’s BSP fittings ensure a safe and reliable fluid system connection and improve the overall efficiency of your equipment.

After watching this video, you will have a more comprehensive understanding of Topa’s BSP hydraulic fittings. Contact us today for more information about Topa, your hydraulic accessories specialist, and we’ll provide you with customized solutions to help your project move forward without any hassle!

Application

BSP hydraulic fittings connect hoses, tubes, and components such as pumps, valves, and cylinders in fluid power systems. They are used in construction, agricultural and forestry machinery, and industrial equipment where the system is designed for BSP connections.
Topa supplies BSP adapters and connectors in steel and stainless steel options. The right configuration depends on the connection at each end, the sealing interface, the working fluid, and the operating conditions. Before selecting a fitting, confirm the thread designation, size, mating connection, material, and applicable pressure rating. For replacement or multi-SKU requirements, provide a part number, drawing, or clear photos of both connection ends for review.

Explore Our Products!

Visit our website to browse our extensive range of BSP fittings, hoses, and accessories—designed for optimal performance in every application.

Products Features

BSP fittings are designed with a variety of configurations to meet diverse hydraulic system needs. The structure typically includes a male or female threaded end, which provides a tight, leak-proof connection. The fittings are usually constructed from high-quality materials such as stainless steel, brass, or carbon steel, ensuring strength and durability even in harsh environments.

Topa supplies BSP hydraulic fittings in configurations designed to work with commonly used hydraulic hose and crimping equipment. Compatibility depends on the fitting series, hose specification, and crimping requirements, so confirm the exact part number and assembly data before use.

Structure

BSP (British Standard Pipe) fittings are based on the ISO 228 and Whitworth thread standards, which were developed to provide secure and reliable connections for pipes and fittings in hydraulic systems. The BSP thread features a 55-degree angle, which is different from the 60-degree angle of NPT threads. This distinction is important for compatibility, as BSP and NPT threads are not interchangeable due to differences in thread geometry. The threads on BSP fittings have rounded peaks and valleys, unlike NPT threads, which have pointed peaks and valleys. This design ensures a smooth, precise connection and helps prevent misalignment and leakage when connected. BSP threads are widely used around the world, particularly in the UK, Europe, Asia, Australia, and many other regions.

Working Principle

BSP fittings work by creating a secure, pressure-resistant connection between two components in a hydraulic system. The threaded design allows for a tight seal when the fitting is screwed into place, which prevents leaks under high-pressure conditions. The threads on both the fitting and the pipe or hose align and interlock, ensuring a solid connection. In BSPT fittings, the tapered threads create a self-sealing effect as they tighten, while BSPP fittings use an external sealing method like a washer or O-ring to ensure no leakage. Depending on the design, BSP fittings often incorporate sealing elements (such as O-rings, PTFE tape, or washers) to ensure an extra layer of leak protection, particularly when used in high-pressure or dynamic applications.

Thread Types

The BSP thread system consists of two primary thread types—BSPP (British Standard Pipe Parallel) and BSPT (British Standard Pipe Tapered). Both of these thread types are based on the British Standard Whitworth (BSW) thread system, which was first developed by Joseph Whitworth in 1841. This makes BSP threads one of the oldest and most widely recognized screw thread standards in the world.

BSPP Threads

Thread Type: Parallel

Designation: BSPP threads are often referred to as “G” threads in the BSP system.

Functionality: BSPP threads are straight, with parallel male and female threads. These fittings rely on external seals (such as O-rings or sealing washers) to achieve a leak-proof connection.

Key Features:

Sealing Mechanism: Seals are created through a bonded ring (e.g., O-ring or sealing washer), which is placed between the male and female threads, pressing against the shoulder of the male fitting and the face of the female fitting. This creates a secure, leak-tight seal.

Application: BSPP fittings are commonly used in low-to-medium-pressure fluid transfer systems where reliable sealing and easy installation are crucial.

Usage: Widely used across the UK, Europe, Asia, Australia, New Zealand, and South Africa. BSPP fittings are often found in hose ends, adapters, and ports in industrial systems.

BSPT Threads

Thread Type: Tapered

Designation: BSPT threads are commonly known as “R” threads in the BSP system.

Functionality: BSPT threads are tapered, meaning they have a conical shape that tightens as the fitting is screwed in, creating a self-sealing effect that prevents fluid leaks without the need for an additional seal.

Key Features:

Sealing Mechanism: As the threads are tapered, they create a seal as they tighten. The sealing occurs when the male thread’s conical shape presses tightly against the female thread, forming a pressure-tight connection.

Application: BSPT fittings are typically used in high-pressure systems or where a permanent seal is needed. These fittings are common in applications that involve gases, fuels, and hydraulic systems.

Usage: BSPT fittings are often used in industrial equipment, pneumatic systems, and heavy machinery where secure, high-pressure connections are essential.

BSP Standard

BSP thread markings describe the thread form and its position on a fitting. G threads are parallel, while R and Rc threads are tapered. Rp is also parallel, but it belongs to the ISO 7 thread system and is designed to pair with an R external thread. These differences affect how the threads engage, so the marking should be checked before selecting a mating fitting.

G Threads: Parallel BSP Threads

A G thread has a constant diameter from the start of the threaded section to the end. It may be external or internal and is commonly identified with the ISO 228 thread system. Because the thread is parallel, tightening does not create a seal through thread wedging.

R Threads: External Tapered Threads

An R thread is an external tapered thread. Its diameter increases gradually toward the fitting body, so it engages progressively with the matching internal thread as the fitting is tightened. R threads are part of the ISO 7 system and are intended for specified sealing pipe-thread connections.

Rc Threads: Internal Tapered Threads

An Rc thread is an internal tapered thread designed to mate with an R external thread. Both threads taper, creating progressively tighter engagement as they are assembled.

Rp Threads: Internal Parallel Threads

An Rp thread is an internal parallel thread in the ISO 7 system. It is designed to pair with an R external tapered thread. Although Rp and G are both parallel, they belong to different thread systems and should not be treated as identical based on shape alone.

Request a Quote!

Ready to move forward? Request a quote today and get competitive pricing on high-quality hydraulic fittings and hoses, delivered on time.

How to Identify British Threads & Fittings

Identifying British Standard Pipe (BSP) threads involves distinguishing between the two main types—BSPP (Parallel) and BSPT (Tapered)—and understanding their unique characteristics. Here’s how to identify and distinguish them:

Determine if the Thread is Parallel or Tapered

BSPP (British Standard Pipe Parallel) threads have straight, parallel male and female threads. These fittings rely on external seals like O-rings, elastomeric seals, or bonded washers to create a leak-proof connection.

BSPT (British Standard Pipe Tapered) threads feature tapered threads, which naturally create a seal by wedging the male and female threads together as they tighten. This requires additional support from thread sealant (such as thread tape or dope).

Thread Flank Angle

Both BSPP and BSPT threads have a 55° flank angle, which is a key characteristic of British threads. This is in contrast to other international standards such as NPT, which have a 60° flank angle.

Imperial Sizes

BSP threads are measured in Imperial sizes, meaning they follow sizes such as 1/8″, 1/4″, 1/2″, 3/4″, etc. This is an important distinction because, despite BSP being a foreign thread standard, it is not metric.

Sealing Mechanism

BSPP Sealing:

BSPP threads are typically sealed by a 30° chamfer on the male thread that mates with a 30° cone seat inside the female thread, commonly used in swivel fittings. For port applications, O-rings, washer seals, or elastomeric seals are required for a proper seal.

BSPT Sealing:

BSPT threads create a seal through thread wedging, and additional sealing compounds (like thread tape or thread dope) are often used to enhance the sealing effect. BSPT fittings do not require additional sealing rings like BSPP fittings.

Confirming Threads Per Inch (TPI)

To confirm whether a fitting is BSP and to determine its size:

Measure the threads per inch (TPI): BSP threads are typically measured by TPI, which can help you differentiate between similar fittings. BSP threads have a defined TPI range, and knowing the exact TPI can help identify the exact size and type of BSP fitting.

Gender and Fitment

Male BSPP fittings usually have a flat face with external threads, and the female BSPP will have a matching flat face with internal threads.

Male BSPT fittings have a tapered thread, while the female BSPT will have a matching tapered thread. Note that it’s possible for a male BSPT fitting to fit into a female BSPP fitting, but this is only functional if the female fitting is non-swivel. This is because the female BSPP features a recessed cone seat, which can interfere with the fit when swivels are involved.

Avoid Common Pitfalls

At Topa, our professional team is dedicated to ensuring that your BSP fitting purchases are smooth and error-free. With our expertise, you can trust that your fittings will perform flawlessly and meet the demands of your hydraulic system.

Sealing Method

BSPP fittings require external seals like O-rings or bonded washers to create a leak-tight connection. Neglecting to select the correct sealing method can lead to leaks or inadequate performance, so always ensure that the proper seals are used based on your system’s requirements.

Confusing BSP with NPT

BSP and NPT threads are not compatible due to differences in thread angles and shapes. BSPT threads have a 55-degree flank angle, while NPT threads use a 60-degree angle. Using the wrong type can result in poor alignment, leaks, or even system failure.

Thread Size Mismatch

BSP fittings come in specific thread sizes, usually measured in imperial units like 1/8", 1/4", 1/2", etc. Ensure that you accurately verify the thread size and TPI (threads per inch) to prevent purchasing fittings that won't fit properly with your existing pipes or hoses.

Get in Touch Today!

Contact our expert team now to discuss your specific hydraulic fitting needs and receive a tailored solution that meets your requirements.

Choose Topa

More Than Just a Hydraulic Fittings Manufacturer

Whether you need customized solutions, expert advice, or fast delivery, our professional team is here to support you every step of the way. With Topa, you can be confident that you’re not just purchasing products, but gaining a trusted partner dedicated to your success.

Customized Solutions

We provide tailor-made hydraulic fittings and hoses to meet the specific requirements of your systems, ensuring compatibility and optimal performance.

Expert Consultation

Our experienced team offers expert advice on fitting selection, installation, and maintenance to help you make the best decisions for your projects.

Fast Delivery

With our large-scale production capabilities and efficient logistics, we ensure timely delivery to meet your project deadlines, no matter where you are located.

Quality Assurance

All our products undergo strict quality control measures to ensure they meet international standards and provide reliable, long-lasting performance.

Technical Support

We offer ongoing technical support for installation, troubleshooting, and system optimization, helping you resolve any issues quickly.

After-Sales Service

We provide excellent after-sales support, including product replacement and warranty services, ensuring your complete satisfaction with every purchase.

Your Reliable BSP Hydraulic Fitting Manufacturer

We focus on supplying reliable hydraulic hoses and fittings for distributors, hose shops, OEMs, and industrial buyers with ongoing purchasing requirements. TOPA provides hydraulic hose, hose fittings, adapters, and related components with consistent specifications, controlled production, and competitive manufacturer-direct pricing.

Our products are designed for stable performance, repeat purchasing, and mixed-SKU supply programs. We support standard and custom requirements, including OEM specifications, private labeling, packaging, and long-term replenishment. For replacement projects, customers can provide part numbers, drawings, samples, or technical requirements for specification review.

Easy to Assemble
Reduced Leakage Risk
No-Skive Options
Consistent Product Specifications
Stable Batch Quality
Mixed-SKU Supply
OEM & Private Label Support
Repeat Order Support

FAQ

What is a BSP hose fitting?

A BSP hydraulic fitting is a hose end or adapter with a connection based on the British Standard Pipe thread system. BSP fittings are available in different thread forms and end configurations. The thread marking alone does not identify the entire fitting, so confirm the thread size, male or female form, mating connection, and sealing interface before selecting a part.

What is the difference between BSPP and BSPT?

BSPP refers to a parallel thread, commonly marked G. BSPT is commonly used to describe tapered BSP threads, but drawings may use more specific ISO 7 designations such as R, Rc, or Rp. The thread form affects how the parts engage, while the fitting design determines where the connection seals. Check both details when identifying a BSP connection.

How can I identify a BSP thread size?

Start with any marking on the fitting, equipment, or drawing. Then check whether the thread is parallel or tapered, measure its outside diameter where accessible, and use a thread-pitch gauge to confirm the pitch.

Is BSP and BSPP the same?

BSP thread is British Standard Pipe, which includes BSPP and BSPT threads. BSPP is a kind of BSP parallel thread with a thread and pitch angle of 55 degrees. It also can use bonded seal rings or 60 degree cones to stop leaking.

How is BSP hydraulic fittings measured?

The size of the BSP refers to the measurement of the internal thread connection, known as the actual diameter (imperial system) The actual diameter (metric system), which is most easily calculated by measuring the shorter length of the thread crest.

Do BSP threads need sealant?

For a specification review or multi-SKU quotation, provide the part number or drawing when available. Include the complete thread designation and size at each end, male or female form, fitting configuration, sealing interface, material, finish, and quantity by SKU.

What is the use of BSP thread?

BSP is a set of thread technical standards, which has been widely used wordwidely. It connects pipes and fittings through female and male threads.BSP thread can be used in many pressure systems on ships.Various materials such as bronze, cast iron, steel, brass, and plastic can be used with BSP hydraulic threads.

Does every BSP fitting need thread sealant?

No single sealing method applies to every BSP fitting. Some connections seal at the threads; others rely on a separate feature such as an O-ring, washer, cone seat, or face seal.

Is BSP tapered or parallel?

BSP hydraulic fittings include two types of threads, one is BSPP thread, which is straight or parallel, the other is BSPT thread, which is tapered. The BSPT male cone will fit together with the BSPT female cone ,and will not cause leak.

Are BSP and NPT threads interchangeable?

Do not assume that BSP and NPT threads are interchangeable. They may appear similar or begin to engage, but differences in thread form and, in some sizes, pitch can prevent correct fit or sealing.