There are three methods for surface treatment of stainless steel: one is to make environmentally friendly black zinc on the surface of stainless steel screws, but because the adhesion between zinc and stainless steel is not strong, it is easy to appear white when used; one is electrophoresis treatment, in Electrophoresis on the surface of the screw is mainly for quality, the surface effect is good, but the price will be more expensive; one is Dacromet black treatment, compared with electrophoresis, the price of Dacromet will be cheaper, and the effect of surface treatment is better than It is better to be plated with environmentally friendly black zinc.

Different countersunk head screws have different head angles, so the diameters of the heads are different. For example, one is 90° and the other is 120°. The diameters of the heads produced by the two angles are different, and the prices are also different. And this countersunk head screw is a half tooth. If you don't know the length of the half tooth and the diameter of the rod (the rod has a large rod and a small rod), the weight of the screw calculated at that time will be very different, and the price will also be different. And advise customers to measure their own products to determine the size of these places.

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