... detail:Export Quality PackagingDelivery Detail :FOB NINGBOSpecifications(1). Product: Square head bolt(2). Grade:8.8(3). Size: M6-36(4). ... and so onSizeM6-M42 LengthM16-300Type of headSquare,Hex,Flange,Hex socket,T-Head and other you can chooseSurface treatmentBlack Oxide,Zinc ... drawing or your sampleRegarding to Nuts Type of NutSquare,Hex,Flange,Hex socket,T-type,Coupling,wheel ,acorn,tapper,and so ...