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Federal 4x4 Wood Post Cap  (3.5" to 4.5") Mahogany

Federal 4x4 Wood Post Cap (3.5" to 4.5") Mahogany

Federal 4x4 Wood Post Cap  (3.5" to 4.5") Mahogany
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Federal 4x4 Wood Post Cap in rich african mahogany wood offers a classic pyramid top design. Each cap is handcrafted in the USA using the finest materials. Sizes available to slip over various 4x4 posts for easy DIY installation.
  • Post Cap only - NOT a light
  • Materials: African Mahogany
  • Slip over style for easy installation
  • Fits a variety of 4x4 Posts: 3.5" to 4.5" square (See sizes below.)
  • Made in the USA
  • Manufacturer: Nantucket Post Cap
  • One year manufacturer warranty


Post caps are made of kiln-dried African mahogany. Kiln-dried means they are completely dry and do not need time to dry out before applying stain or paint.

Product Care:

Nantucket wood products are sold in their "natural" state so they can be stained or painted to match or coordinate with any project. Because post caps are installed horizontally on top of the post, they receive the most sun exposure. Although you may leave cedar posts to weather naturally, manufacturer highly recommends sealing all wood caps before installation. Apply an exterior urethane stain or paint to all surfaces, including inside and under the base, to ensure long life. Many semi-transparent seals are available for cedar to maintain its natural look, while still protecting the caps.

Note: This product will not be covered under manufacturer warranty if not treated prior to being installed.


We recommend predrilling the caps and using a small finish screw to adhere them to the posts. This makes it easy to take the cap off, if it ever needs to be replaced. 

For a nail-free look, simply apply an exterior marine adhesive like 3M 5200 to the top of the post and slip the post cap over. Stainless steel nails may be used as an alternative, but not necessary.



Measure the length and width of your post for best fit. Order by actual post size. Base opening of post cap will be 1/8" larger to easily slip over your post and to allow the wood to naturally expand and contract. 


3-1/2" Post: $22.00
3-3/4" Post: $24.00
Full 4" Post: $28.00
4-1/2" Post: $29.00