... We have 8.8,10.9,12.9 grade of track bolt and nut,plow bolt and nut,segment bolt and ... 170,000PSI HRC38-42Track bolt and nut,from diameter 7/16'' to 1 1/4'',from M12 to M27,if you ... send here.Thank you ! 8.8-12.9 Grade of track bolt with nut for excavator