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4.8 8.8 Grade DIN7500 Hex Flange-Head Cross-Recess Triangular-Thread Lock Screws M4m5m6m8m10, Find Details and Price about DIN7500 Triangular Lock Screws Zinc-Plated Triangular-Tooth Screw from 4.8 8.8 Grade DIN7500 Hex Flange-Head Cross-Recess Triangular-Thread Lock Screws M4m5m6m8m10 - Hebei Lingke Metal Products Co., Ltd