Please tell me about screw grades.
Example:
We were instructed by a client to manufacture a 6g (equivalent to Grade 2) product, but because we wanted to manufacture a high-quality product, we manufactured and shipped the product using a 4h (equivalent to Grade 1) thread gauge. As a result, the product was deemed to have failed the client's acceptance inspection. Why was this the case when we manufactured a product with good precision?
Thread grade indicates the position of the tolerance
The grade of a screw does not indicate its quality, but indicates the position of the tolerance. A screw gauge must be selected that matches the grade of the product.
[Effective diameter relationship diagram]
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