Hot Dipped Galvanized Square Plate Washers

When to use galvanized square plate washers

Timber framing, sill plates, deck ledgers, and anchor bolt connections are usually outdoors or in treated lumber, so the washer needs both a broad footprint and lasting corrosion resistance. A hot dipped galvanized square plate washer delivers both: the wide, thick square body spreads clamping load, seats against wood grain, and acts as a shim to prevent pull-through, while the hot-dip zinc coating, much thicker than electroplating, resists corrosion far longer outdoors. Match galvanized washers with galvanized bolts and nuts, and note that treated lumber accelerates corrosion, so galvanized or stainless hardware is important there.

Why choose hot dipped galvanized square plate washers

• Broad footprint: spreads load and prevents pull-through in wood.
• Thick zinc coating: outlasts standard plating in outdoor and wet use.
• Shim action: thick body protects the surface from crushing.
• Match coating: pairs with galvanized bolts and nuts.

Common applications for galvanized square plate washers

• Timber framing and heavy wood construction
• Sill plates and anchor bolt connections
• Deck ledgers and treated-lumber joints
• Outdoor and wet structural fastening

For angled flanges, see square beveled washers, and browse every option on the main square washers category.

Hot Dipped Galvanized Square Plate Washers FAQ

Why galvanized for square plate washers?

Hot dip galvanizing gives a thick, durable zinc coating that resists corrosion far longer outdoors, which suits the exterior and treated-lumber use common in timber construction.

Should I match galvanized washers with galvanized bolts?

Yes. Pairing galvanized to galvanized keeps the whole joint at the same corrosion life and avoids galvanic issues between dissimilar coatings.

Are these good with treated lumber?

Treated lumber accelerates corrosion, so galvanized or stainless hardware is recommended. Galvanized square plate washers are a common choice.