Plastic Bulkhead Fitting & Straight Hose Barb Connector — M6 to M16, Reducing & Equal

Match the metric thread size (M6, M8, M10, M12, M14, or M16) to your hose inner diameter and the thread on your tank or panel. The variant name format is generally: [step count]-[thread size]-[barb outlet mm]. For example, "4-M8-6 fitting" has an M8 thread and a 6mm (≈1/4") barb outlet. When in doubt, measure your hose ID and existing fitting thread before ordering. A 6mm barb typically fits 6mm ID tubing; a 10mm barb fits 10mm ID tubing.

These fittings are generally made from engineering-grade plastic — typically nylon or polypropylene. They are lightweight, corrosion-resistant, and suitable for low-to-medium pressure fluid transfer. They are not intended for use with strong solvents or high-temperature fluids.

Yes. Plastic fittings are inherently corrosion-resistant and generally perform well in outdoor and wet environments such as pond plumbing, rainwater harvesting, and irrigation systems. Prolonged direct UV exposure may cause gradual degradation over time. They are not recommended for high-temperature applications (typically above 60°C / 140°F).

Plastic bulkhead and hose barb fittings are generally rated for low-to-medium pressure use — typically up to 60–100 PSI depending on fluid type, temperature, and whether a hose clamp is used. For high-pressure or safety-critical applications, please contact us to confirm suitability before ordering.

Yes. The threaded bulkhead portion follows standard metric thread profiles (M6 through M16). They are designed to pair with the included plastic lock nut for panel or tank mounting. In most cases the thread pitch follows standard coarse metric pitch for each diameter, but if your application requires a specific pitch, please contact us to confirm before ordering.

The fitting variants (e.g., "3-M6-4 fitting") include the complete bulkhead hose barb connector body plus a lock nut. The plastic nut variants (e.g., "M6 plastic nut") are replacement or additional lock nuts sold separately — useful if you need extra nuts for multi-panel installations or if a nut is lost or damaged.

These straight hose barb connectors are generally compatible with flexible tubing such as silicone hose, vinyl tubing, and rubber hose with an inner diameter matching the barb outlet size. A hose clamp is recommended for secure, leak-free connections, especially in pressurized or vibration-prone installations.