1) NUT ,BOLT AND WASHER 2) Manufacturer Directly 3) ASTM ... PackinghCertificationRegarding to Bolts StandardDIN931,DIN933,DIN6914,ASTM A325M,ASTMA325, ASTM A-10,ASTM490M and other you ... to your drawing or your sampleRegarding to Nuts Type of NutSquare,Hex,Flange,Hex socket, ... acorn,tapper,and so onRegarding to Washers Type of WasherRound ,Square,Plat,Friction,Plate ASTM A325 NUTS AND BOLTS HARDWARE