... ). Surface treatment: Black oxidePhotos for detailPhotos for PackingRegarding to Bolts StandardDIN931,DIN933,DIN6914,ASTM A325M,ASTMA325, ASTM A ... -10,ASTM490M and other you would like to Grade4.8,6.8,8.8,10.9,12 ... T-type,Coupling,wheel ,acorn,tapper,and so onRegarding to Washers Type of WasherRound ,Square,Plat,Friction,PlateWhy ... of manufacturing fasteners DIN6914/6915 Hex Nuts M12-M33 Bolt and Nut