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Type 1 Grade 8 GB6171 M8 (P1.0) Carbon Steel/Alloy Steel Fine Thread Black Hexagon Nut, Find Details and Price about Type 1 Hexagon Nut GB6171 Black Hexagon Nut from Type 1 Grade 8 GB6171 M8 (P1.0) Carbon Steel/Alloy Steel Fine Thread Black Hexagon Nut - Hunan Standard Industrial Products Co., Ltd.