... for PackinghCertificationRegarding to Bolts StandardDIN931,DIN933,DIN6914,ASTM A325M,ASTMA325, ASTM A-10,ASTM490M and other you would ... #, 40Cr, 35CrMoA, 42CrMoA, 25Cr2MoVA, 35VB, 40CrNiMo,Stainless steel and so onSizeM6-M42 LengthM16-300Type of headSquare,Hex,Flange,Hex ... ,acorn,tapper,and so onRegarding to Washers Type of WasherRound ,Square,Plat,Friction,Plate ASTM A325 NUTS AND BOLTS HARDWARE