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Premium vinyl fence post caps in various styles including Gothic, New England, and Pyramid on a white fence

Vinyl Post Caps | 4x4, 5x5 & Decorative Styles

Your post caps are the "crown" of your fence. Whether you are replacing a single wind-blown cap or finishing a new project, we offer the industry's widest selection of 4-inch and 5-inch vinyl post caps. From traditional New England and Gothic points to modern Internal Flat caps, our professional-grade vinyl is UV-stabilized to prevent yellowing or brittleness. Shop our inventory below for bulk discounts, fast nationwide shipping, or local pickup at our Greensburg, IN showroom.

Quick Selection Guide:
  • Traditional Look: New England or Federation styles.
  • Decorative Flair: Gothic or Ball/Dome caps.
  • Modern & Clean: Internal Flat or External Pyramid caps.
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3.5" x 3.5" Gothic Vinyl Post Cap 3.5" x 3.5" Gothic Vinyl Post Cap

White Only!
3.5" x 3.5" White Vinyl Gothic Post Cap
Max Profile dimensions: 3.510" Sq.
Corner Radius: Square
Extends 0.045" over the profile
Total Height: 4.875"

Our Price: $9.99
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3.5" x 3.5" Square External Post Cap 3.5" x 3.5" Square External Post Cap

White only!
Max Profile dimensions 3.51"Sq.
Corner Radius: 0.125"
Extends 0.670" over the profile
Total Height: 1.424"

Our Price: $5.99
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Gothic fence cap in white 4" x 4" Gothic Cap

White, Tan/Almond, Adobe/Khaki colors available!
Maximum profile dimensions 4.010" Sq.
Corner radius: 0.188"
Extends 1.350" over profile
Total Height: 7.750"

Our Price: $8.05
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Ball cap with .312 corner radius 4" x 4" Ball/Dome Cap (R 0.312)

54 total
4" x 4" ball/dome caps
Corner radius of .312.
Tan ONLY!

List Price: $447.12
Our Price: $172.80
Sale Price: $172.80
Savings: $274.32
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4" Dome Cap 4" x 4" Ball/Dome Post Cap

Model: LMT1117
Maximum profile dimensions: 4.025"
Extends 0.680" over the post profile
Dome diameter: 3.818"
Total height: 5"

Our Price: $8.99
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4" x 4" Black Style Post Cap 4" x 4" Black Style Post Cap

Black is in!! This decorative cap has a black top that goes with our 4x4 classic white cap. The black to is glued to the top of the cap to create a one of a kind look!

Our Price: $15.33
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4" Classic Post Cap 4" x 4" Classic Post Cap

Model: C44CLS
Dimensions: 4" x 4" x 2.55" H
Inside corner radius: 0.0125"
Cap lip extends 1.025" over the post
White, Tan, Adobe

Our Price: $8.99
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4in Hampton Cap 4" x 4" Hampton Cap

LMT1326
Maximum profile dimensions: 4.010" x 4.010"
Corner radius: 0.060"
Extends 1.44" over the profile
Total height: 2.24"

Our Price: $8.99
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White vinyl fence caps 4" x 4" Internal Flat Cap

Vinyl/PVC 4" x 4" Internal Pyramid Post Cap
Dimensions: 4" x 4" x 1.55"H
Outside Corner Radius: 0.25"
Fits/Slides down into post 0.75"
0.8" Above/over the post
White, Tan, Adobe

Our Price: $5.99
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White fence cap in New England style 4" x 4" New England Cap

4" New England Cap
Dimensions: 4" x 4" x 1.78" H
Cap Lip: 1"

Our Price: $7.60
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Teardrop Post Cap 4" x 4" Teardrop Cap (R 0.312) 31 pack

31 Teardrop post caps
31
total 4" x 4" teardrop caps with a corner radius of .312. Tan ONLY!

List Price: $392.96
Our Price: $99.20
Sale Price: $99.20
Savings: $293.76
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5" Coachman Cap 5" Coachman Cap

LMT1351
Maximum profile dimensions 5" Sq.
Corner radius: Sharp
Extends 0.660" over the profile
Total height: 7.375"

Our Price: $11.93
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5" Dome Cap 5" Dome/Ball Cap

LMT1119
Maximum profile dimensions 5.025" Sq.
Corner radius: 0.125"
Extends .680" over the profile
Dome diameter: 4.695"
Total height: 6.160"

Our Price: $9.99
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5in Federation Cap 5" Federation Cap - Vinyl Post Cap

LMT 1140
Maximum profile dimensions 5.010" Sq.
Corner radius: 0.125"
Extends 1.5" over the profile
Total height: 3.463"

Our Price: $12.80
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Vinyl 5" New England Cap 5" New England Cap

5" New England Cap - for 5" x 5" Vinyl Posts
Dimensions Outside: 7" x 7" x 2.192" H
Inside: 5" x 5"
Cap Lip: 1.30"
Slides down on post 1"

Our Price: $9.79
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5" Classic Post Cap 5" x 5" Classic Post Cap

C55CLS
Dimensions: 5" x 5" x 2.74" H
Inside corner radius: .0188"
Cap Lip: 1.028"

Our Price: $9.99
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5" External Post Cap 5" x 5" External Post Cap

Max Profile Dimensions: 5.02" x 5.02"
Total Height: 1.875"H
Inside corner radius: 0.1719" (11/64")
Cap Lip: 1"

Our Price: $5.95
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5" Gothic Cap 5" x 5" Gothic Post Cap

LMT1312
Maximum profile dimiensions: 5.010" Sq.
Corner radius: 0.125"
Extends 1.600" over the profile
Total height: 9.625"

Our Price: $9.99
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Vinyl 5" Internal Flat Cap 5" x 5" Internal Flat Post Cap

Have a clean post look with these internal caps. Designed to fit your 5 inch post. Comes in white, tan, and adobe.

Our Price: $5.65
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5in Hampton Cap 5in Hampton Cap

Add the finishing touch to your fence of railing with this Hampton Cap. Designed to fit on your 5 inch post.

Our Price: $11.60
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6" External Post Cap 6" x 6" External Post Cap

The cap that is seen on many fences and  porch railing. This cap is simple and easy it install like most of out caps. Will fit 6" x 6" vinyl posts!

Our Price: $7.99
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6in Federation Cap 6" x 6" Federation Cap

A great accent to your posts. This is a tall style cap that may be the right fit for your home. Designed to fit on a 6 inch post.

Our Price: $37.39
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6" x 6" New England Post Cap 6" x 6" New England Post Cap

This New England cap fits 6" x 6" vinyl posts. True to Size. Matches the New England style accessories.

Our Price: $10.99
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LMT Glue Vinyl Fence Glue 8oz.

8oz. Vinyl Glue
Will not yellow or fade.
exceptional long-term UV stability and integrity



Our Price: $22.05
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MFT Glue White Vinyl/PVC Glue

Need some glue for your vinyl accessories like post caps and gate pockets? This is some excellent vinyl glue!

- Can be used to glue post caps on
- 1 oz will glue approximatly 80 caps

Our Price: $8.99
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Vinyl Post Cap FAQ: Sizing and Installation

Finding the right cap can be tricky if you didn't install the original fence. Here are the common questions we answer for our Greensburg customers every day:

Internal vs. External: Which do I need?

External Caps: These are the most common style. They slide over the outside of the post like a lid on a jar. Be sure to take an outside-to-outside measurement of your post to ensure a proper fit.

Internal Caps: These slide inside the post for a flush, minimalist look. For these to work, we recommend measuring both the inside opening and the outside wall thickness of your posts, as wall thickness can vary by manufacturer.

How do I stop my caps from blowing off or being stolen?

The Problem: High winds create an "uplift" effect that pops friction-fit caps off, while gates near public sidewalks are prone to caps being knocked off or taken.

The Solutions:

  • For a Permanent Fix: Apply a small bead of Professional Grade Vinyl Glue to the inside tabs of the cap before pressing it on. This chemically welds the cap to the post.
  • For Security (Public Areas): Use color-matching rivets or a single stainless steel hex-head screw on a hidden side. This locks the cap in place without rusting and prevents theft.
  • Our Favorite Removable Method: Use a caulk gun to apply a bead of silicone adhesive to the internal tabs. This provides enough grip to withstand high winds but allows you to pop the cap off for maintenance or cleaning without damaging the post.

Will these fit my wood posts?

The Problem: A standard vinyl 4x4 cap is "true to size" (4.0"), making it too large for a standard 4x4 wood post, which is typically 3.5".

The Solution: Our caps are specifically engineered for vinyl post dimensions, not wood. Because wood posts vary significantly due to moisture and age, we highly recommend measuring your post and comparing it to the specific cap dimensions listed on our product pages before purchasing.

Why 100% Vinyl Beats Wood or Composite

Wood has obvious downsides, like rotting and the need for yearly staining. Even composites can fail if the outer vinyl layer is scratched, allowing moisture to reach the wood-filler core and cause rot.

Products with 100% vinyl do not have wood filler, so rotting is never an issue. We have vinyl fences and decks installed since our first year in business (1997) that still look great today!

Pro Tip: If you are replacing caps in colors like Adobe or Tan, we recommend replacing the entire run at once. While our vinyl is UV-stabilized, years of sun exposure can eventually cause older caps to lose their original sheen. A brand-new cap will likely have a different finish than one that has been "baking" in the sun for a decade.