BSPP Fittings

Reliable Sealing Solutions for Hydraulic & Fluid Power Systems

When you’re working with hydraulic systems, there’s no room for guesswork—especially when it comes to fittings. At Union Hydraulics, we supply high-quality BSPP fittings designed to give you a dependable, leak-free connection in a wide range of applications.

If you’ve landed here, chances are you’re either replacing a fitting, building a new system, or trying to match an existing connection. Let’s walk through exactly what BSPP fittings are, when to use them, and how to make sure you’re choosing the right one.

What Are BSPP Fittings?

BSPP (British Standard Pipe Parallel) fittings use parallel (straight) threads rather than tapered threads. Unlike NPT fittings that seal through thread interference, BSPP fittings rely on a sealing method at the face of the fitting, typically using:

• Bonded seals (Dowty washers)
• O-rings
• Metal-to-metal sealing surfaces

This design creates a more controlled and consistent seal—especially in systems where precision matters.

Why BSPP Fittings Matter in Hydraulic Systems

Choosing the right fitting isn’t just about compatibility—it directly impacts performance, safety, and longevity. BSPP fittings are commonly used in:

• Hydraulic equipment
• Industrial machinery
• Agricultural systems
• Mobile equipment
• Imported or European-designed systems

If you’re working on equipment with British or metric standards, BSPP fittings are often the correct—and only—option.

Key Benefits of BSPP Fittings

Consistent, Reliable Sealing

Because BSPP fittings don’t rely on thread deformation, they provide a more predictable seal when paired with the correct washer or O-ring.

Reusable Without Compromising Performance

You can disconnect and reconnect BSPP fittings without damaging the threads, making them ideal for maintenance-heavy environments.

Reduced Risk of Leaks

When installed properly with the right sealing method, BSPP fittings significantly reduce the chance of leaks compared to improperly matched thread types.

Ideal for High-Precision Applications

The parallel thread design allows for better alignment and positioning—especially important in tight or complex hydraulic assemblies.

Common Types of BSPP Fittings We Offer

At Union Hydraulics, we carry a wide range of BSPP configurations to match your exact needs, including:

• Straight adapters
• 45° and 90° elbows
• Tees and cross fittings
• Male and female BSPP connections
• BSPP to NPT or JIC adapters

Whether you’re connecting hoses, adapting between thread types, or building out a full system, we’ve got the fittings to support it.

How to Identify a BSPP Fitting

If you’re unsure whether you need BSPP, here are a few quick ways to check:

• Thread Type: Parallel (not tapered)
• Sealing Method: Uses a washer or O-ring—not thread sealant alone
• Origin of Equipment: Often found on European or imported machinery

Still not sure? That’s where we come in.

Choosing the Right BSPP Fitting

Getting the right fit the first time saves you time, money, and frustration. When selecting a BSPP fitting, consider:

• Thread size and pitch
• Male vs. female connection
• Sealing method required
• Pressure rating of your system
• Material compatibility (steel, stainless, brass, etc.)

If any of that feels unclear, don’t worry—you’re not expected to figure it out alone.

Why Buy BSPP Fittings from Union Hydraulics?

We don’t just sell fittings—we help you get it right.

At Union Hydraulics, we work with contractors, maintenance teams, and industrial buyers every day who need answers fast and parts that perform. When you order from us, you can expect:

• Quality components built for demanding environments
• Inventory ready to ship when you need it
• Knowledgeable support from people who understand hydraulic systems
• Straightforward guidance—no guesswork, no runaround

Need Help Finding the Right BSPP Fitting?

If you’re not 100% sure which BSPP fitting you need, give us a call. We’ll help you identify the correct part based on your application, measurements, or even a photo.

A quick conversation now can save you hours of downtime later.

Frequently Asked Questions About BSPP Fittings

What’s the difference between BSPP and NPT fittings?

BSPP uses parallel threads and seals with a washer or O-ring. NPT uses tapered threads and seals through thread interference.

Can BSPP and BSPT fittings be used together?

Not recommended. BSPT is tapered, and mixing the two can lead to improper sealing and leaks.

Do BSPP fittings require thread sealant?

Typically no. The seal is created at the face using a washer or O-ring—not the threads.

Final Thoughts

BSPP fittings are a critical component in many hydraulic and fluid power systems, especially when working with imported or precision equipment. Choosing the right fitting ensures proper sealing, reduces leaks, and keeps your system running efficiently.

At Union Hydraulics, we’re here to make that process simple. Whether you know exactly what you need or you’re still figuring it out, we’re ready to help.
Call us today with any questions—we’ll make sure you get the right BSPP fitting the first time.