... ---1S1860,7H3599---2S2140 We are professional manufacture of earthmoving fastener,all of our fastener are made by high grade ... P.S.I. There are 10.9,12.9 class of track bolt and nut,plow bolt and nut,segment ... Komatsu,ESCO,JCB....If you want to know more of our products,please feel free to contact with us ... oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Komatsu 12.9 Grade of Track bolt with nut