It's difficult to evaluate a screw, but I do it trotdem. Thanks to the specified standard (DIN 931), I can say that this screw meets the standard: The thread length is approximately 36mm, the height of head 7,5 mm and the overall length of 188mm. The material I now could not analyze, but is imprinted least A4-80. What more do you want? I nothing - and that's why I give it 5 stars.