40Cr High Strength 12.9 Grade 207 32 51210 Cold Forging Track Bolt And Nut For Komatsu Excavator Pc300 61.have more than 10 years experience 2.from 1/2'' to 1.1/8'' ; M12 -- M30 3.raw material:40Cr/35CrMo 4.ISO9001:2000
40Cr High Strength 12.9 Grade 207 32 51210 Cold Forging Track Bolt And Nut For Komatsu Excavator Pc3