Straight BSP inch couplings
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Straight inch couplings with BSP threads
Hydraulic couplings from the category below can be used as hose connectors as well as adapters - for connecting various power hydraulics components. Straight couplings with BSP inch threads (commonly known as British threads ) Straight BSP couplings are among the basic couplings used worldwide - they are the most popular couplings. The connectors have two external threads - sometimes these couplings are called BB couplings (B = external thread). The couplings come with the same threads on both sides or with reducing threads. BSP couplings have a larger hexagon and can be used as adapters (after using a PPG metal-rubber washer ) Execution : galvanized free-cutting steel (stainless steel also available on request). Our offer also includes couplings with inch-metric threads. The couplings presented in the category below can be used, among others : for connecting hydraulic hoses with BSP threads, i.e. DKR fittings with inch threads (the couplings have a standard 60-degree cone); as adapters for hydraulic control valves, hydraulic valves or cylinders etc. Alternative designation for straight connectors : Straight coupling 3469; Reducing straight coupling 3467
Hydraulic nipples with British BSP inch threads
Straight hydraulic nipple – what is it and what is it used for ? A straight hydraulic nipple is one of the basic couplings used in power hydraulics, designed for connecting lines, hydraulic hoses, and other components in hydraulic, pneumatic, and other systems. It is a double-threaded coupling designed to provide a tight and durable connection in hydraulic installations operating under high pressure. Nipples come in versions with the same thread on both sides and in versions of hydraulic reducing nipples - with two different thread sizes. Nipple is a common term for straight couplings and reducing couplings.
Straight BB BSP inch couplings, male-to-male hydraulic BSP couplings
Straight BB BSP inch couplings (with external male threads on both sides, also known as straight BSP nipples or AGR-AGR adapters) are key power hydraulics fasteners designed for leak-free connection and reduction of flexible pressure hoses and rigid pipes in hydraulic installations. Złączki typu BB posiadają z obu stron zewnętrzny gwint calowy rurowy walcowy BSP/BSPP (G) ze stożkiem wewnętrznym 60°, co umożliwia bezpośrednie nakręcenie końcówek przewodów hydraulicznych ze stożkiem 60° (DKR) lub wykonanie połączenia z podkładką uszczelniającą. They are used for efficient connection of hoses, creating reducing transitions between different diameters of oil lines, and expanding valve blocks. Made of free-cutting steel protected by an anti-corrosion zinc coating, straight BB BSP couplings meet rigorous industry standards (ISO 8434-6, BS 5200), guaranteeing full tightness and mechanical durability under operating pressures up to 400 bar.
Application and technical characteristics of straight BB BSP couplings
Straight BB BSP inch couplings are commonly used in mobile and stationary hydraulic systems. The double-male construction allows for instant connection of two lines finished with DKR swivel nuts without the need to dismantle adjacent components.
- Double-male construction (BB / AGR-AGR): External BSP thread on both sides facilitates direct mounting of swivel nuts.
- Standardized 60° sealing cone: Metal-to-metal seat sealing on the 60° cone provides reliable mechanical tightness at high pressures.
- Wide selection of straight and reducing versions: Available symmetric sizes (e.g. 1/4"x1/4", 3/8"x3/8", 1/2"x1/2", 3/4"x3/4", 1"x1") and reducing couplings (e.g. 1/4"x3/8", 3/8"x1/2", 1/2"x3/4", 3/4"x1").
- High pressure resistance up to 400 bar: The robust steel body shows resistance to shocks, vibrations, and pressure spikes in the system.
- Corrosion protection: Galvanized surface (white passivation) protects the component against moisture, weather conditions, and industrial oils.
Why choose straight BB BSP inch couplings at the HYDRON store?
Straight BB BSP couplings offered by the HYDRON brand are characterized by excellent threading precision and perfect finishing of cone seats. They eliminate the risk of damage to cones in hose ends and exclude the occurrence of hydraulic oil micro-leaks. Dimensional variety allows for trouble-free selection of the correct reduction for any medium flow rate. For the construction and comprehensive maintenance of power hydraulic systems, we recommend matching components from our offer, such as flexible hydraulic hoses, matching steel hose fittings, self-sealing test points and reliable hydraulic quick couplings.
Technical specification
| Technical parameter | Value / Description |
|---|---|
| Product category | Straight BB BSP inch couplings (straight BSP nipples / AGR-AGR) |
| Thread type | BSP / BSPP (G) cylindrical pipe inch – external on both sides (male) |
| Available thread size ranges | 1/8", 1/4", 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", 1.1/2", 2" BSP |
| Sealing standard | 60° internal cone (metal-to-metal seat) or for sealing washer |
| Materials and protective coating | Free-cutting / weldable steel, galvanized (white passivation) |
| Maximum working pressure | from 125 bar to 400 bar (depending on thread size) |
| Compliance with standards | ISO 8434-6, BS 5200, DIN 3852 |
| Operating temperature range | from -20°C to +120°C |
Frequently Asked Questions (FAQ)
What is a BB type straight coupling?
A BB type coupling (so-called straight nipple) has an external (male) thread on both sides. It is used for directly connecting two hydraulic hoses finished with swivel nuts with internal threads.
What does the abbreviation BSP mean in power hydraulics?
BSP (British Standard Pipe / BSPP cylindrical - G) is a British pipe thread standard with a 55° thread angle. In hydraulics, BSP couplings usually seal on a 60° cone or on a face seat.
Should Teflon tape be used for a 60° BSP cone connection?
No. Sealing in 60° cone couplings occurs mechanically on the metal-to-metal cone contact surface. The use of adhesives or Teflon tapes on threads with a cone is not required.
What is the difference between an equal straight coupling and a reducing one?
An equal coupling has the same thread size on both sides (e.g. 1/2" x 1/2"). A reducing coupling allows for connecting two lines with different thread diameters (e.g. 1/2" x 3/4").