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The standard size of nuts depends on the thread standard used, and common thread standards include metric threads and imperial threads.
Here are some standard sizes of common nuts:
Metric threaded nut:
The dimensions of metric threaded nuts are usually described in terms of thread diameter (D), pitch (P), and nut height (H).
Common metric threaded nuts include M3, M4, M5, M6, M8, M10, M12, M16, M20, M24 and other models, where M represents the size of the thread diameter and the number represents the size of the diameter.
British threaded nut:
The size of British threaded nuts is usually described in terms of thread diameter (D), thread pitch (TPI, Threads Per Inch), and nut height (H).
Common British threaded nuts include 1/4-20, 5/16-18, 3/8-16, 1/2-13, 5/8-11, 3/4-10, 1-8 and other models, where the number represents the diameter of the thread and the number after it represents the number of threads per inch.
The size of nuts usually follows international standards ISO, or standards from other countries or regions, such as ASME/ANSI standards in the United States, BS standards in the United Kingdom, DIN standards in Germany, etc.
Here are some common nut sizes:
1. M3: The thread diameter is 3mm, and the commonly used pitch is 0.5mm.
2. M4: The thread diameter is 4mm, and the commonly used pitch is 0.7mm.
3. M5: The thread diameter is 5mm, and the commonly used pitch is 0.8mm.
4. M6: The thread diameter is 6mm, and the commonly used pitch is 1mm.
5. M8: The thread diameter is 8mm, and the commonly used pitch is 1.25mm.
6. M10: The thread diameter is 10mm, and the commonly used pitch is 1.5mm.
7. M12: The thread diameter is 12mm, and the commonly used pitch is 1.75mm.
8. M16: The thread diameter is 16mm, and the commonly used pitch is 2mm.
9. M20: The thread diameter is 20mm, and the commonly used pitch is 2.5mm.
The above are only some common standard sizes, in fact, there are more sizes to choose from, including non-standard sizes. The specific dimensions need to be determined based on actual application and design requirements. For example, high nuts, low nuts, thin nuts, etc. When selecting nuts, in addition to size, factors such as material, surface treatment, and performance should also be considered.
