Nuts are also called nuts. Generally, there are many kinds of nuts, including hexagonal nuts, round nuts, square nuts, etc. What are the common standards for nuts?

For hexagon nuts, the commonly used standards are GB52, GB6170, GB6172 and DIN934. The main difference between them is that the thickness of GB6170 is thicker than that of GB52, GB6172 and DIN934, commonly known as thick nuts. The other is the difference on the opposite side. In the M8 nut series, the opposite side of DIN934, GB6170 and GB6172 is 13MM smaller than that of GB52, 14MM smaller, M10 nut, the opposite side of DIN934 and GB52 is 17MM larger than that of GB6170 and GB6172, M12 nut, DIN934 and GB52 are 19MM larger than that of GB6170 and GB6172, 18MM larger. For M14 nuts, the opposite side of DIN934 and GB52 is 22mm, which is 1mm larger than the opposite side of GB6170 and GB6172, which is 21mm. The other is the M22 nut. The opposite side of DIN934 and GB52 is 32MM, which is 2MM smaller than the 34MM opposite side of GB6170 and GB6172. (GB6170 and GB6172 have the same width across the edges except for their different thicknesses) Other specifications can be used in general without considering the thickness.

In terms of internal hexagon, there are two versions of the national standard, one is GB70-76, the 76 version, the other is GB70-85, the 85 version. Therefore, attention should be paid to the differences in the actual business operation: GB70-85 and DIN912 are completely identical, so there is no difference in the use of the new standard. The main difference is between GB70-76 and DIN912: for M8 series of internal hexagon products, the round head diameter of GB70-76 is 12.5 mm, which is smaller than 13.27 mm of DIN912, For M10 series hexagonal socket products, the round head diameter of GB70-76 is 15MM, which is smaller than 16.27 of DIN912; for M12 series hexagonal socket products, the round head diameter of GB70-76 is 18MM, which is smaller than 18.27 of DIN912; for M16 and M20 series hexagonal socket products, the round head diameter of GB70-76 is 0.33MM, which is 24MM and 30MM, respectively. For DIN912, it is 24.33MM and 30.33MM respectively. In addition, the width of the inner opposite side between the hexagon socket of the old standard and the German standard varies due to different standards. The inner opposite side of GB70-76 is smaller, which should also be noted in business operations.