First grade ,Alloy steel ,12.9 Bolt/nut for for Construction machine: Komatsu, Caterpillar ... :1)raw material:40CR,35CRMO 2)Grade:10.9,12.9 3)Finish color: grey, black 4)Machine: ... results:NAME OF SAMPLEPLOW BOLTDESCRIPTIONDIAMETER >16MARKS RAW MATERIAL40CrGRADEGRADE:12.9QUANTITY4NBISJB/T 5932.5-1991THE BOLT IS USED TO ... ,977191S8804/154-32-11210D80A-8 Sell 40Cr 12.9 grade high strength bolt and nut