1.Incoloy 825 special alloy fasteners bolt and nut 2.Standard:GB, ISO, DIN, BS, ANSI ... M64(1/4-3inch) 1.Incoloy 825 special alloy fasteners bolt and nut 2.Standard:GB, ISO, DIN, BS, ANSI ... -M64(1/4-3inch) 1.Incoloy 825 special alloy fasteners bolt and nut2.Standard: GB, ISO, DIN, BS, ANSI/ASME ... stainless steel, incoloy, incolonel, hastelloy, monel, nimonic etc.5. Grade: 4-10, A2, A4, A2-70, A4-80.6. ...