1) Bolt nut and washer 2) Manufacturer Directly 3) Reasonable price 4 ... , 35CrMoA, 42CrMoA, 25Cr2MoVA, 35VB, 40CrNiMo,Stainless steel and so onSizeM6-M42 LengthM16-300Type of headSquare,Hex,Flange,Hex ... Oxide,Zinc plated,hot dip galvanized,Dacrotizing plated and your requirementOthersWe can make accroding to your drawing ... We have 10years experience of manufacturing fasteners Mechanical Nut and Bolt