As per DIN 912 / ISO 4762 available in all sizes & starting form M3 to M52 (and Corresponding dia i n UNC are available )and grades 4.6, 5.6, 8.8, 10.9, 12.9 And 14.9. Also stainless steel screws in A2, A4, A2 - 50, 70 & 80 grades are available in Bumax 88 & Bumax 09 (Equivalent to 8.8 & 10.9 grade respectively )