National standard dimensional tolerance standard of metal hardware stamping parts-hardware

The tolerance value of metal hardware stamping parts is related to the dimensions of this stamping part and the thickness of the material, as well as the accuracy of the product. In 'GB/T13914-2002 Dimensional Tolerance of Stamping PartsThe tolerances of the formed metal hardware stamping parts are divided into 10 tolerance levels, which are represented by FT1-FT10 respectively. The numbers represent the tolerance levels, and FT represents the dimensional tolerances, which are arranged in order according to the size of the numbers. The tolerance of flat metal hardware stamping parts is divided into 11 grades, which are represented by ST1-ST11, and the order is also arranged according to the size of the number. For the deviation of metal hardware stamping parts, the upper and lower deviations of the product's hole center point, height, stretched length, hole edge distance, etc. are 1/2 of the dimensional tolerance. The down deviation of the hole size is 0, and the upper deviation is the lower deviation. Add dimensional tolerance; the shaft size stipulates that the upper deviation is the basic deviation, the value is 0, and the lower deviation is the upper deviation minus the dimensional tolerance. Hardware, 15 years of craftsmanship focused on metal hardware stamping parts. Operation and production of 20,000+ sets of customized molds, more than 20 Ru0026D and design engineers, 16 quality inspection procedures to firmly check product quality, 3 million stamping production capacity per day, solve your product accuracy problems, and solve your time demand problems. Solve your bulk supply problem. Choose, choose rest assured!