How do SST control the quality of the phillips pan head self tapping screw?
How do SST control the quality of the phillips pan head self tapping screw? A customer in the United States gave us an order, which is a phillips pan head self tapping screw and a carbon steel black zinc plated. At the time of producing the customer’s phillips pan head self tapping screw , Shi Shi Tong did it twice in the beginning. Mainly because the first part of the screw head is not at the same center. At the time of the first inspection, no problems were found. At the second inspection, we found this problem and we immediately stopped production. It turned out that during the production process, the position of the mold was slightly deviated, resulting in the head and the rod not being in the same center. Then we made adjustments. In the second production, we checked the problem every 10 minutes basically, and it was completed until the beginning, and there was no problem. After the phillips pan head self tapping screw is finished, ...