Plastic Hose Barb Fitting with External Thread — Straight Tube Connector for Air, Water & Fluid Lines
When a leaking connection brings your project to a halt — whether it's a DIY irrigation setup, a pneumatic line, or a lab fluid system — the culprit is often a mismatched or worn-out fitting. Hobbyists, makers, and small-shop technicians who work with flexible tubing need a reliable plastic hose barb fitting that threads in cleanly and holds tight without cracking or stripping.
Each connector is a one-piece external thread straight joint made from rigid plastic, combining a threaded male end with a barbed hose shank in a single inline body. Available barb diameters range from 2.8mm (≈0.11") to 12.7mm (≈0.50"), and thread shank sizes include 1/8", 1/4", and 3/8" — giving you 16 size combinations to match your exact tubing and port requirements. Packing options run from 1 to 50 pieces per order.
Typical use cases include connecting flexible PVC or polyurethane tubing to threaded ports on air compressors, aquarium pumps, and drip irrigation manifolds; routing coolant lines in small CNC or 3D printing setups; and building custom fluid-transfer assemblies where a straight inline barb-to-thread transition is needed.
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Compatibility: Designed for flexible plastic tubing (PVC, polyurethane, nylon, silicone) with inner diameters matching the selected barb size. Thread end is compatible with 1/8", 1/4", or 3/8" NPT/BSP ports — verify your equipment's thread standard before ordering.
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Size confirmation: Barb diameter must match your tubing's inner diameter (ID), not outer diameter. If you are unsure of your thread standard (NPT vs. BSP), please contact us to confirm before purchasing.
✅ Key Features of These Plastic Hose Barb Fittings
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📐Wide Size Range — Barb diameters from 2.8mm to 12.7mm with 1/8", 1/4", and 3/8" thread options cover the most common tubing and port combinations in DIY and light industrial fluid lines.
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🔩External Thread Design — The male threaded end screws directly into a female-threaded port or manifold, creating a secure mechanical connection without adapters or additional hardware.
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💧Barbed Shank for Grip — The ridged barb profile bites into flexible tubing to resist pull-out and reduce the risk of leaks in low-to-medium pressure air and water line applications.
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⚙️Rigid Plastic Construction — Lightweight and corrosion-resistant, these straight tube connectors are well-suited for indoor plumbing, aquarium systems, and pneumatic circuits where metal fittings would add unnecessary weight or cost.
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📦Flexible Pack Quantities — Order from 1 to 50 pieces per size, so you can grab a single replacement fitting or stock up for a larger installation without overpaying for quantity you don't need.
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🛠️Tool-Free Tubing Connection — Push flexible hose onto the barb by hand; no crimping tools required. Adding a hose clamp over the barb is recommended for pressurized lines to ensure a leak-resistant hose barb connection.
📐 Technical Specifications — Plastic Straight Tube Connector
| Product Type |
External Thread Straight Joint Hose Barb Fitting |
| Material |
Rigid plastic (see variant options for specific grade) |
| Barb Diameter Options |
2.8mm (≈0.11"), 3.9mm (≈0.15"), 4.8mm (≈0.19"), 6.4mm (≈0.25"), 7.9mm (≈0.31"), 9.5mm (≈0.37"), 11.1mm (≈0.44"), 12.7mm (≈0.50") |
| Thread Shank Size |
1/8", 1/4", 3/8" (external male thread) |
| Thread Standard |
Typically NPT or BSP — contact us to confirm |
| Connection Style |
Straight inline (barb one end, threaded male other end) |
| Compatible Tubing Types |
Flexible PVC, polyurethane, nylon, silicone hose |
| Recommended Pressure Range |
Low-to-medium pressure; typically up to 60–100 PSI (contact us to confirm for your application) |
| Color / Finish |
See variant options |
| Pack Quantities Available |
1, 5, 10, 20, 30, 50 pieces |
| Country of Origin |
See variant options / Contact us to confirm |
❓ Frequently Asked Questions
How do I choose the right tube size and thread size?
Match the barb diameter to your tubing's inner diameter (ID). For example, a 4.8mm barb generally fits tubing with a 4.8mm ID. Thread size (1/8", 1/4", or 3/8") should match the female port on your equipment. When in doubt, measure your existing fitting with calipers or check your equipment's manual for port specifications.
What is the maximum pressure these connectors can handle?
Plastic straight tube connectors are typically rated for low-to-medium pressure applications. For most air and water line uses, they generally handle pressures up to around 60–100 PSI depending on tubing material, temperature, and installation method. Contact us to confirm if your application requires a specific pressure rating.
Can these connectors be used outdoors or in wet environments?
These plastic fittings are generally resistant to moisture and mild corrosion, making them suitable for indoor plumbing, drip irrigation, and light outdoor use. For prolonged UV exposure or harsh outdoor conditions, additional protection or UV-resistant tubing is recommended. They are not intended for high-temperature steam or aggressive chemical environments.
What thread standard do these connectors use — NPT or BSP?
The external threads are sized in standard fractional inch designations (1/8", 1/4", 3/8"). They are typically compatible with NPT (National Pipe Thread) or BSP (British Standard Pipe) ports of the same nominal size. Because NPT and BSP have slightly different thread angles, we recommend confirming your equipment's thread standard before ordering. Contact us if you need clarification.
What types of tubing are compatible with these barb fittings?
These barb connectors are generally compatible with flexible plastic tubing such as PVC, polyurethane, nylon, and silicone hose with matching inner diameters. Rigid tubing is not compatible with barb-style fittings. A hose clamp over the barb is recommended for secure, leak-resistant connections under pressure.
How many pieces should I order?
Pack sizes range from 1 to 50 pieces. For a single repair or prototype, a 1-piece or 5-piece pack is practical. For larger installations — such as an irrigation manifold or a production assembly line — the 20–50 piece packs offer a lower cost per unit. All pack sizes ship from our US warehouse.
Do I need thread tape or sealant when installing these fittings?
For a leak-free seal on the threaded end, applying PTFE (Teflon) thread tape before installation is generally recommended, especially for pressurized fluid or air lines. This is standard practice for threaded pipe fittings and helps compensate for minor thread tolerance variations between NPT and BSP standards.
🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.
