Shenzhen Shi Shi Tong Metal Products Co., Ltd

  How to measure the truss head self tapping screws? Large  truss head self tapping screws  can be produced with reference to many standards. When measuring screws, what is the national standard for determining a product? National standard? German standard? Japanese standard? American Standard? British standard? ISO standard, or other? Many products, many standards, can pass, that is to say, they are similar to the size specifications of a certain product, only a certain two specifications will be different, and the tolerance range is a little different. Or the size of the non-standard screw custom screws will be slightly different. There are usually two methods for measuring the  truss head self tapping screws . If it is an external thread, the general size can directly measure the rib outer diameter with the vernier caliper, you can know how big the size of the screw. The length of the screw generally refers to the length of the thread, excluding the height of the ...

  Different truss head self tapping screws There was no problem during the process of use. Therefore, when Miss Yang’s company wanted  truss head self tapping screws , Miss Yang once again found the Shi Shi Tong screw manufacturer. Miss Yang sent the drawings of the  truss head self tapping screws  to the Shi Shi Tong screw manufacturer. Ms. Yang said that this screw allows us to provide samples to her first. Miss Yang’s company needs to try the assembly first to see if their design is ok. Then mass production. When I looked at Miss Yang’s drawings, I found that the slot of the  truss head self tapping screws   is different from the common slot. The common slot is cut directly or hit the edge of the head, but this slot is wrapped inside the head, not to the edge. According to Miss Yang’s drawings, we quickly offered a quote to Miss Yang. Then Miss Yang directly asked us to make a contract for her, and then let the financial payment.  If you w...