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When choosing screws for outdoor use, it is important to consider the type of material you will be working with. For example, if you are building a deck or fence with pressure-treated wood, you should use screws that are compatible with this type of wood to prevent degradation and ensure a secure connection. Deck screws, for instance, are designed specifically for use with pressure-treated wood and have a special coating to resist corrosion.

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3 inch outside diameter flat washer