Jinggu Cheng Measuring Machinery Co., Ltd.: Trademark Registration Certificate No. 6218323
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The American trapezoidal thread plug gauge has the function of comprehensively detecting various parameters of the thread, such as large, medium, small diameter, pitch, and tooth profile half angle. The specifications of the ring and plug gauges are both (0.75-20.238) inches, with an accuracy level of 3A, 3B. The metric accuracy levels are 6g and 6h. The ACME series uses American ladder thread gauges (plug rings), as well as American short tooth ladder thread gauges (plug rings) and American unified thread gauges (UN series) (plug rings)