Kunshan Grace Precision Hardware Co., Ltd. is a manufacturer of all standard DIN, BS, JIS and ISO fasteners and other industrial parts with well-equipped testing facilities and strong technical force.
ASTM A563 Heavy hex Nut astm a563 gr dh heavy hex nut Hexagon Nuts Product Description ASTM A563 Heavy hex Nut Material 45#,40Cr,35Cr Mo Grade 4.6/5.6...