创建于02.19
Thread Types Classification: A Comprehensive Guide
Threaded connections are widely used in industries like hydraulic systems, automotive, and construction due to their versatility and reliability. Understanding the different types of threads is crucial for ensuring compatibility and leak-free connections. This guide will classify the most common thread types used in various applications.
1. Metric Threads (ISO Metric Thread)
Metric threads are standardized by the International Organization for Standardization (ISO) and are measured in millimeters.
Key Features:
• Designation: Represented by “M” followed by the nominal diameter and pitch (e.g., M10x1.5).
• Applications: Commonly used in automotive, machinery, and construction.
• Advantages: Internationally recognized and easy to measure.
2. Unified Threads (UNC, UNF, UNEF)
Unified threads are widely used in North America and have three main classifications:
• UNC (Unified Coarse Thread): Coarse pitch, ideal for quick assembly and disassembly.
• UNF (Unified Fine Thread): Fine pitch, offering better tension and resistance to vibration.
• UNEF (Unified Extra Fine Thread): Extra-fine pitch, used in precision applications.
Applications: Automotive, aerospace, and general engineering.
3. British Standard Pipe (BSP)
BSP threads are used for pipe connections and come in two main types:
• BSPP (Parallel): Threads are parallel, requiring a gasket or O-ring for sealing.
• BSPT (Tapered): Threads are tapered, creating a mechanical seal when tightened.
Applications: Fluid transfer, plumbing, and hydraulic systems.
4. NPT (National Pipe Thread)
NPT threads are tapered, ensuring a leak-proof seal without the need for gaskets. They are commonly used in the United States.
Applications: Oil and gas, water supply, and hydraulic systems.
5. JIS Threads (Japanese Industrial Standard)
JIS threads are primarily used in Japanese machinery and hydraulic systems. They are similar to BSP threads but have minor dimensional differences.
Applications: Automotive, marine, and heavy machinery.
6. SAE Threads
SAE (Society of Automotive Engineers) threads are commonly used in hydraulic fittings, ensuring compatibility with SAE flanges and connections.
Applications: Automotive, construction, and industrial equipment.
7. ACME Threads
ACME threads have a trapezoidal shape, providing strength and smooth movement. They are often used in lead screws and power transmission systems.
Applications: Machinery, jacks, and linear motion systems.
8. DIN Threads
DIN (Deutsches Institut für Normung) threads are standardized in Germany and are common in European hydraulic systems and machinery.
9. Thread Selection Factors
When choosing the right thread type, consider the following factors:
• Compatibility: Ensure matching threads for a secure connection.
• Pressure Requirements: Some thread types are better suited for high-pressure applications.
• Sealing Mechanism: Determine if a gasket, O-ring, or tapered fit is necessary for leak prevention.
10. JETE FITTINGS: High-Quality Threaded Solutions
At JETE FITTINGS, we offer a wide range of threaded fittings and connectors that meet international standards, ensuring reliable and leak-free connections. Visit
jetefittings.com for more information on our high-quality products.
Conclusion
Understanding the different thread types is essential for selecting the right fittings and ensuring system performance. Whether you’re working with hydraulic, automotive, or industrial systems, trust JETE FITTINGS to provide the best threaded solutions for your needs.