... ). Product: Hex bolt and nut(2). Standard: DIN6914(3). Grade:8.8(4). Size: M16-M30(5). Surface treatment: ... 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,PlateWhy you choose ... of manufacturing fasteners DIN6914/6915 Hex Nuts M12-M33 Bolt and Nut