Measuring method of length and dimension of different types and specifications of screws and screws
Some purchasers do not know much about the length and dimension measurement of different screws and screws, but they must know when purchasing screws.
Some purchasers do not know much about the length and dimension measurement of different screws and screws, but they must know when purchasing screws. Today, the professional basic question in the measurement of screw length and dimension will be answered by Xiaobian. There are different measurement standards and regulations for different screw length measurement. It must be performed according to the measurement standards of the screw industry.
Length measurement of screws: such as cross recessed pan head screws, hexagon head bolts, hexagon socket head screws, umbrella head screws, self-tapping screws with pads, large flat screws, etc., its length and diameter measurement method is to directly measure the length of the screw thread diameter , does not include the screw head, that is to say, when measuring, the measurement with a caliper does not need to include the screw head measurement. Measure the diameter and length of the screw thread.
Like cross-recessed countersunk head screws, which are also called countersunk head screws and flat head screws, the length and dimensions of this type of screw are different from other screws. It is special, its measurement length dimension standard is diameter including screw head measurement. The method is to use a caliper to measure a straight line from the head of the countersunk head screw to the tail of the screw thread. That is, the length dimension of the entire screw is its length.
Of course, no matter what screw length and size we are measuring, there is a standard, which is the national standard size of our screw industry. In the process of measuring the length of the screw, the measuring tools we have to use are calipers, micrometers, etc. And in this measurement process, there will definitely be errors, so what should we do? This requires us to measure several times and then take the average value. It is best to have professional screw quality personnel come and go to measure the length of the screws and screws