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Hex Nut Carbon Steel DIN 934 GB6170 Standard Black Oxide Hexagon Nut High Strength Nut Heavy Hex Nut Grade 4 8 10 12 Size M-M64, Find Details and Price about Hex Nuts Hex Nut from Hex Nut Carbon Steel DIN 934 GB6170 Standard Black Oxide Hexagon Nut High Strength Nut Heavy Hex Nut Grade 4 8 10 12 Size M-M64 - Huizhou Gunite Technology Co., Ltd