... :Using the material from the regular large-scale steel mill , provide the material quality certificate along with the ... sample ,drawing and pics are available.productSee PhotosSize 2"-60", 50mm-1500mmClass 4.8, 8.8, 10.9, ... steel,mid-carbon steel, alloy steelDateNot more than 60 daysPackagingpaper bag,wooden case,pallet or according to the ... The main drawings are as following: liner bolt for ball mill