#din931

We are manufacturers, supplier and exporter of Din 931 bolt in India.  The steel quality used to manufacture of the DIN 931 grade 8.8 bolts includes Grades A2 and A4 class 70. This International Standard specifies the characteristics of hexagon head bolts with threads from M1,6 up to and including M64, of product grade A for threads M1,6 to M24 and nominal lengths up to and including 10d or 150 mm, whichever is the shorter, and product grade B for threads over M24 or nominal lengths over 10d or 150 mm, whichever is the shorter.