4x4 Post Cap │White Flat Top

Four by four nominal White Flat Top Post Cap for wooden posts.

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Our American-made White Flat Top 4x4 post caps are the perfect accent for a fence you’re about to install, or a railing you’re thinking about installing on your deck. The flat or plateau top looks similar to some of the most traditional wooden fence post caps you’ve probably seen. The classic design of these 4x4 post toppers will enhance the look of any landscape, and add a decorative touch that won’t interfere with your landscape or outdoor furniture design scheme.

View our installation instructions here.

4X4 White Flat Top Post Caps

  • Comes in Nominal (3.5” x 3.5” up to 3.75" x 3.75") and Actual (4.0" x 4.0" to 4.6" x 4.6")

  • These caps slide down the post 1.5” and are 5.5” x 5.5” at their widest point.

  • 10 year guarantee against fading, discoloration and warping!

  • High impact, remarkably sturdy ASA resin. The same material used in automobiles!

  • Made in the U.S.A.

  • Quick and easy patented SNAP-CAP installation, built right into the cap!

  • Fraction of the cost of comparable wood caps.

  • Contractor and bulk pricing available!

Our white flat top 4x4 post caps come in two versions: Nominal and Actual. These designations have been around since before the days of machine milling. Nominal referred to (and still does,) rough, unfinished or “green wood.” By the time the wood was planed after drying, a 4” x 4” post was really a 3.5” x 3.5” post. Actual refers to a post that is true to the description. Nominal and Actual are standardized terms in the lumber industry.

These flat top fence post caps are made of ASA resin, a type of hard plastic that’s used by auto and marine vehicle manufacturers. It is impact and UV resistant. Unlike wood, which is subject to decay, erosion and rotting, ASA resin won’t fade, discolor, or warp. We give you a 10-year guarantee against discoloration, warping, and fading.

  • ASA resin isn’t subject to the continual problems that wood faces with shrinkage and expansion. Humidity fluctuations compromise the strength of wood and shorten its lifespan.
  • Our ASA resin fence post caps cost less than comparable wood products and last much longer. They don’t require any maintenance, either.
  • Actual or true white flat top 4x4 post caps will fit Trex and vinyl posts.
  • Our fence post toppers are the only patented post caps on the market. Our SNAP-CAP installation technique is so fast and easy that you’ll be able to install the caps yourself. And the best part is that you won’t see any screws or nails.

We are committed to ensuring 100% customer satisfaction. If you’re not convinced that our fence post caps are the right product for you, we’ll refund the full purchase price.

Frequently Asked Questions