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8 bugle head screw

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8 bugle head screw 8 bugle head screw

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  • 1. Principle. Because zinc does not change easily in dry air, and in humid air, the surface can form a very dense film of zinc carbonate, which can effectively protect the interior from corrosion. And when the coating is damaged for some reason and the matrix is not too large, the zinc and steel matrix form a micro cell, so that the fastener matrix becomes the cathode and is protected. It is widely used in automobile transportation and other industries, but what is needed is the trivalent chromium passivation layer, zinc nickel alloy plating closed coating, reduce the harmful and toxic layer of hexavalent chromium passivation.

    8 bugle head screw

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    8 bugle head screw 8 bugle head screw

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  • Carbon spring steel wire should have high tensile strength, elastic limit, endurance and fatigue strength, and impact and vibration resistance. To ensure the strength and endurance index, especially to avoid changing the occurrence of cracks, is the key to produce spring steel wire. The inner quality and surface quality of the wire rod directly affect the function of the wire.

    8 bugle head screw

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    8 bugle head screw 8 bugle head screw

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  • 8 bugle head screw

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    8 bugle head screw 8 bugle head screw

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  • 8 bugle head screw

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    8 bugle head screw 8 bugle head screw

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