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