Custom m2.5 stainless steel countersunk head hexagon drive dacromet coated screw

Industry knowledge：

What data should be provided for non-standard screw customization?

1. The dimensions, such as thread diameter, pitch, head diameter, head thickness, rod length, tolerance, etc., shall meet the production requirements, which usually need to be clearly marked by the customer on the drawing.
2. Material: there are many kinds of wire rods for screw production. Different materials have different mechanical properties. The customer should explain which material he needs.
3. Production process, the tolerance and finish made by different production methods are also different.
4. Requirements for surface treatment, hardening heat treatment, salt spray test, etc.
5. Use purpose: for general production of non-standard screws, the manufacturer shall be informed of their use purpose. A clear understanding of the details is helpful for production.