... ,nut,bolt,washer end bitfor Caterpillar Komatsu, Bofors,Hitach,Hyunday,Kobelco,JohndeerMaterial composition: MaterialHardnessV-norchTensileElongationYieldW147-52HRCAkv>=16J>=1499Mpa>=3%>=1040N/mm2W248 ... ,S400,S450HYUNDAI R130,R210,R220,R280,R290,R300,R320,R450KOBELCO SK200,SK230,SK350,ESCO 18S,25S,40S,45S,18S,25S,30S ...