1.Incoloy 825 special alloy fasteners bolt and nut 2.Standard:GB, ISO, DIN, ... (1/4-3inch) 1.Incoloy 825 special alloy fasteners bolt and nut 2.Standard:GB, ISO, DIN, BS ... -M64(1/4-3inch) 1.Incoloy 825 special alloy fasteners bolt and nut2.Standard: GB, ISO, DIN, BS, ... according to customers' reqquirements.4.Material: super duplex stainless steel, incoloy, incolonel, hastelloy, monel, nimonic etc.5. ...