All of our 12.9 grade of track bolt,plow bolt,segment bolt and nut made in 40Cr or 42CrMo,black ... There are 10.9,12.9 class of track bolt and nut,plow bolt and nut,segment bolt with nut,wheel bolt ... sample. Except these fastener,we also can produce pins and locks,bushes for Cat,Komatsu,ESCO,JCB....If you ... 12.9 or 170 grade of Plow Bolt, Track Bolt and Segment Bolt