1/8"-2" BSP Thread Fittings x Barb Hose Tail End Connector For Air Fuel Water

Measure the inner diameter (ID) of your flexible hose. Select a barb whose outer diameter (OD) matches or is 1–2 mm larger than the hose ID. A slightly oversized barb creates the interference fit needed to grip the hose and resist pull-out. If you are using a hose clamp, you can go up to 2–3 mm over the hose ID.

BSP is the umbrella standard. BSPP (British Standard Pipe Parallel) has straight threads and relies on a sealing washer or O-ring at the face. BSPT (British Standard Pipe Taper) has tapered threads that seal by thread interference, often with PTFE tape. Check your port type before ordering — parallel and taper threads are not interchangeable for sealing purposes, though they can engage mechanically.

Choose stainless steel (304) for outdoor, marine, humid, or mildly corrosive environments where brass may dezincify or corrode over time. Choose brass for general indoor plumbing, compressed air, and fuel systems where cost-effectiveness matters and the environment is not aggressively corrosive. Both materials are suitable for water, air, and most fuels — verify compatibility with any specialty chemicals.

These fittings are designed for general-purpose fluid and air transfer. For high-pressure pneumatic systems (above approximately 10 bar / 145 psi), always verify the rated working pressure for your specific size and material combination, and use appropriate hose clamps. Contact us to confirm pressure ratings for your exact variant if needed.

Both brass and stainless steel are generally compatible with petrol and diesel at ambient temperatures. However, always confirm that the flexible hose you pair with the fitting is also fuel-rated. For ethanol-blended fuels (E10, E85), stainless steel is the more resistant choice. Do not use these fittings with concentrated acids, strong alkalis, or solvents without confirming chemical compatibility.

The ribbed barb profile provides mechanical retention without a clamp in many low-pressure applications. For systems operating above approximately 3–5 bar, or where vibration is present, a worm-drive or ear clamp is strongly recommended to prevent hose blow-off. Always use a clamp on fuel lines regardless of pressure as a safety measure.

A straight fitting connects the threaded port and the hose barb in a straight line — ideal when the hose runs directly away from the port. An elbow (90°) fitting redirects the hose at a right angle, useful in tight spaces or when routing hose parallel to a panel. Y-Piece and T-Piece fittings split one hose into two branches, while an X-Piece creates a four-way junction.