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JSP Manufacturing

4x4 Nominal (3-5/8"x 3-5/8") White Plastic Fence Post Caps with Nail Hole

4x4 Nominal (3-5/8"x 3-5/8") White Plastic Fence Post Caps with Nail Hole

Regular price $ 6.59 USD
Regular price Sale price $ 6.59 USD
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JSP Manufacturing® Plastic White Nominal 4x4 (3-5/8"x 3-5/8") Nail Hole Fence Post Cap

This is a multi-quantity pack item. Please select correct Package Quantity. The More you buy the more you save! 

Our JSP Brand Plastic White 4x4 (3-5/8"x 3-5/8") Nail Hole Fence Post Cap are heavy duty and durable with a smooth seamless finish.  Designed to fit Nominal 4x4 posts with a pre-cut nail hole and center stem support arm for easy installation. Our Fence caps are the perfect fit for your project from building a deck, fence or mailbox post and can withstand the elements such as rain, snow, wind and the harsh sun.

  • Plastic White 4x4 (3-5/8"x 3-5/8") Nail Hole Fence Post Caps.
  • If you post measures a true 4”x4”, this cap will NOT fit, please click this link for True 4x4 (100mm) Fence Cap.
  • Easy Installation - Must be secured with nails (nails are NOT INCLUDED).
  • Pre-cut with 1/8” diameter Nail hole – recommend using a Ring Shank 6D or larger nail or 11 gauge nail (2 inches or longer).
  • 2mm-thick to protect your pressure treated posts from water and sun damage
  • Very Durable and contains UV inhibitors to protect against the elements.
  • Cap presses over the outside of a nominal 4x4 post (nominal posts measure 3-1/2”x3-1/2”).
  • Can be painted, must use a paint that adheres to plastic.
  • Inside Dimension 3-5/8" x 3-5/8" Square.
  • A little flex, but will NOT STRETCH.
  • Multi-pack Listing - quantity based on quantity you select, please verify your quantity selected.
  • Made in USA!
Bulk order discounts are available, please contact us for pricing for bulk orders. 

Product Specifications:

  • Size: 4x4 (3-5/8"x 3-5/8") Cap
  • Style: Nominal
  • Material: Polypropylene
  • Pack Sizes Available: 1, 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 24, 32, 54, 75, 100, 125, 150, and 200 Pack
  • Color: White
  • Brand: JSP Manufacturing®

Measures Approximately: see Images

  • Inside Dimension: 3-5/8” x 3-5/8 inches
  • Overall Height: 1-1/4 inches
  • Slant Height: 1-3/8 inch
  • Cap Edge Height: 1/2 inch
  • Top Surface Dimension: 1-1/2”x1-1/2 inches
  • Thickness: 2mm or 0.079 inches

Fits:  Nominal 4x4 (3-1/2"x 3-1/2") posts.

See attached chart image / chart picture that shows nominal size boards true actual sizes.

 If you are unsure if this product will work with your post, please contact us for additional assistance. 

Failure to measure, will result in refunds minus any shipping charges.


We guarantee that if you place the order on a business day before 2PM (EST), it will ship out that same day. If placed after 2PM (EST), it will ship out the following business day.

Orders received on weekends after 2PM (EST) Friday through 2PM (EST) Monday will ship on Monday. Shipping will start counting Tuesday.

Two-Day Shipping (when available) - shipping days start being counted the day after the shipping carrier receives that package. For example, if they receive the package on Monday before the cutoff time it will be delivered on Wednesday. (Day 1 is Tuesday / Day 2 is Wednesday – does not include the order date). TWO BUSINESS DAYS *Does not include weekends or holidays.

Unfortunately, once your order leaves our facility, we are unable to control delays or errors by the shipping carrier.

Returns will be the cost of the item purchased, MINUS any shipping costs that we incurred shipping to you, or any return shipping costs. All returns must be in unused, undamaged, and unaltered condition. If you have any questions regarding your return, please contact us.