The difference between the new standard and the old standard

The difference between the new standard and the old standard is: M8, M10, M12, M14, M22 series products differ in the width of opposite sides. Except for the new products of the M22 series, the opposite sides of the heads of the new standard products M8, M10, M12, and M14 are 1MM smaller than the opposite sides of the old standard. Respectively 13, 16, 18, 21MM, and the new products of the M22 series, the new standard is 2MM larger than the opposite side of the old standard, so special attention should be paid. For the thickness of the head, there is a slight difference between the new standard and the old standard, and it can be used in general if the requirements are not very strict.

　　The difference between the new standard and the German standard is that the product specifications of M10, M12, M14, and M22 differ in the width of the opposite sides. The new heads of M10, M12, and M14 are 1MM smaller than the German standard. For the new product of M22, the width of the opposite side of the head is 2mm larger than the opposite side of the German standard. Others can be used universally. (Guide: The difference between stainless steel and stainless iron)

　　 For hexagonal nuts, commonly used standards are: GB52, GB6170, GB6172 and DIN934. The main differences between them are: GB6170 is thicker than GB52, GB6172 and DIN934, commonly known as thick nuts. The other is the difference between the opposite sides. In the M8 nut series, the opposite sides of DIN934, GB6170, and GB6172 are 13MM which is 1MM smaller than the 14MM opposite to the GB52. For the M10 nut, the opposite side of DIN934 and GB52 is 17MM. The opposite side of GB6170 and GB6172 is 1MM larger. For M12 nuts, the opposite side of DIN934 and GB52 is 19MM, which is 1MM larger than the opposite side of GB6170 and GB6172, which is 18MM. For the M14 nut, 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 on opposite sides except for their different thicknesses) The other specifications can be used universally without considering the thickness.

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