3 4 drywall screws

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3 4 drywall screws

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3 4 drywall screws 3 4 drywall screws

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  • Galvanizing can be done by zincate galvanizing or chloride galvanizing. Appropriate additives should be used to obtain a coating that meets the requirements of this standard. Light treatment should be carried out after light plating. The parts that need to be dehydrogenated for passivation should be passivated after dehydrogenation. Before passivation, 1%H2SO4 or 1% hydrochloric acid should be applied for activation for 5~15s. Passivation shall be treated with colored chromate unless otherwise specified in the design drawings.

    3 4 drywall screws

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    3 4 drywall screws 3 4 drywall screws

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