What Are the Common Sizes for Metric Hydraulic Hose Fittings
2025-12-23
When building or maintaining hydraulic systems, selecting the correct components is crucial for performance and safety. A fundamental question many engineers and technicians ask is: What are the common sizes for Metric Hydraulic Hose Fittings? Understanding these standard sizes is key to ensuring leak-free connections and optimal system efficiency. At Wayfong, a trusted name in fluid conveyance solutions, we specialize in providing precise and reliable Metric Hydraulic Hose Fittings for a wide range of industrial applications. This guide will clarify the standard sizing system to help you make an informed choice.
The sizing for Metric Hydraulic Hose Fittings primarily refers to the thread specifications. Unlike SAE fittings, metric fittings follow ISO (International Organization for Standardization) standards. The most critical dimensions are the thread size and pitch.
Common Metric Thread Sizes:
The size is typically denoted by the nominal thread diameter in millimeters and the pitch (distance between threads). Here are some of the most frequently used sizes:
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M12x1.5
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M14x1.5
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M16x1.5
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M18x1.5
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M22x1.5
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M27x2.0
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M33x2.0
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M42x2.0
Matching Fitting Size to Hose Diameter
It is vital to match the fitting thread size to the hose inner diameter (ID). The table below shows typical correlations:
| Hose Inner Diameter (ID) mm | Common Metric Fitting Thread Size |
|---|---|
| 6 | M12x1.5 |
| 8 | M14x1.5 |
| 10 | M16x1.5 |
| 12 | M18x1.5 |
| 16 | M22x1.5 |
| 20 | M27x2.0 |
| 25 | M33x2.0 |
Metric Hydraulic Hose Fitting FAQ
Q: How do I accurately measure a metric hydraulic fitting?
A: You need a caliper to measure the thread's outer diameter (OD). Measure the male thread's major diameter or the female thread's minor diameter. Then, use a thread pitch gauge to determine the exact distance between threads (e.g., 1.5mm). The combination (e.g., 16mm OD with 1.5mm pitch = M16x1.5) gives you the correct size.
Q: Are metric and BSP fittings interchangeable?
A: No, they are not interchangeable. While both use millimeter measurements, Metric Hydraulic Hose Fittings have a 60-degree thread form, while BSP (British Standard Pipe) fittings have a 55-degree form. Attempting to connect them will result in cross-threading and significant leakage.
Q: Can I use a metric fitting on an SAE hose?
A: This is generally not recommended. Metric Hydraulic Hose Fittings and SAE hoses have different thread standards and sealing methods. Using an incorrect fitting can compromise system integrity. Always use fittings specified for your hose standard, or use a certified adapter from a reputable supplier like Wayfong.
Choosing the right Metric Hydraulic Hose Fitting size is non-negotiable for system safety and longevity. Incorrect sizing leads to downtime, leaks, and potential hazards. At Wayfong, we offer a comprehensive range of precisely machined Metric Hydraulic Hose Fittings in all standard and specialized sizes, manufactured to the highest quality standards. Our technical experts can help you navigate these specifications to find the perfect fit for your application. Contact us today for a consultation or to request our detailed product catalog. Let Wayfong be your reliable partner in hydraulic efficiency.
