Round head tapping screws with pin

For hexagonal nuts, the 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. Another difference is the difference in opposite sides. In the M8 nut series, the opposite sides of DIN934, GB6170 and GB6172 are all 13MM, which is 1MM smaller than the 14MM of GB52. For M10 nuts, the opposite sides of DIN934 and GB52 are 17MM, which is 1MM larger than the opposite sides of GB6170 and GB6172. For M12 nuts, the opposite sides of DIN934 and GB52 are 19MM, which is 1MM larger than the 18MM of GB6170 and GB6172. For M14 nuts, the opposite side of DIN934 and GB52 is 22MM, which is 1MM larger than the opposite side of 21MM of GB6170 and GB6172. In addition, for M22 nuts, the opposite side of DIN934 and GB52 is 32MM, which is 2MM smaller than the opposite side of 34MM of GB6170 and GB6172. (GB6170 and GB6172 have the same opposite side width except for their different thickness) The other specifications can be used universally without considering the thickness.

[Accessories: Round head tapping screw with pin]