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Can I use yellow zinc coated construction screws on shower brass fitting?

  • Zinc is silver grey, maybe they are yellow brass ( up to 40 % zinc). – blacksmith37 Feb 5 at 1:51
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    @blacksmith37 zinc chromate is yellow, and a common coating for construction fasteners. – Jasen Feb 5 at 5:21
  • It might look funny. The color is similar, but not a match and the luster is different. Better to use brass screws and maybe coat the heads with polyurethane to prevent tarnishing. – Greg Nickoloff Feb 10 at 12:46
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"yellow zinc" is probably zinc chromate, it's a rust preventative plating, but I wouldn't like to bet on its longevity in a damp location in contact with brass.

Spend an extra few dollars for brass, or brass plated, screws.

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Yellow construction screws are commonly zinc chromate plating over a steel screw. They are softer than drywall screws and work better in structural applications. They are stronger and take stress better than hardened and brittle drywall screws.

They are not suitable for wet applications, such as decks, and if the zinc chromate plating gets chipped or worn off, the fastener will rust. They are not recommended for applications where they contact dissimilar metals, where corrosion is likely to occur readily.

The result will not be what you desire.

I suggest that you procure brass screws, and use those. They will work in the shower setting much better, and you will not have incompatible metals creating a corrosion issue.

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  • drywall screws are also available in zinc chromate. – Jasen Feb 6 at 8:32

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