... , 25Cr2MoVA, 35VB, 40CrNiMo,Stainless steel and so onSizeM6-M42 LengthM16-300Type of headSquare,Hex,Flange,Hex socket,T-Head and other ... your drawing or your sampleRegarding to Nuts Type of NutSquare,Hex,Flange,Hex socket,T-type,Coupling,wheel ,acorn ... ,tapper,and so onRegarding to Washers Type of WasherRound ,Square,Plat,Friction,Plate ASTM A325 NUTS ...