MaterialAluminum 6063-T6
FinishAAMA 2604 super-durable powder coating
ColorBlack
Size4 in.

Posts and accessories

4" Flat Press Cap - Black

Fence post cap: the 4″ flat press cap is the largest cap in our flat press range, sized for 4″ x 4″ square aluminum posts like our 4×4 HD posts. It presses onto the post top for a clean, low-profile finish and helps keep water, dirt and debris out.

  • Aluminum 6063-T6
  • AAMA 2604 super-durable powder coating
  • Black
$23.76
Black 4 in. flat press-in aluminum post caps

$23.76

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  • Factory direct from Aluglobus Aluminum Systems
  • Nationwide shipping across the U.S.
  • Project support for homeowners and trade pros
MaterialAluminum 6063-T6
FinishAAMA 2604 super-durable powder coating
ColorBlack
Size4 in.
4.9 ★100+ Google reviews
1,000+Active contractors nationwide
Matchedto Aluglobus systems
Factory directSold as listed

Get the Highlights

ALU40 black fence along a lawn

Posts, slats and accessories that work as one system.

White T&G fence with black top rail

Black, white, bronze or woodgrain.

ALU40 woodgrain fence by a pool

AAMA 2604 powder coat over a 7-stage pretreatment.

Long T&G privacy fence

Built for long, straight runs.

ALU40 fence by a two-story house

Factory direct, shipped nationwide.

4″ flat press capblack powder coatAluminumSold as listedShips nationwideExpert supportFactory direct4″ flat press capblack powder coatAluminumSold as listedShips nationwideExpert supportFactory direct

Product specs

4″ Flat Press Cap for 4x4 Aluminum Posts

Largest flat press cap size: this 4″ cap fits 4″ x 4″ square aluminum posts, including the 4×4 HD posts in 8 ft and 11 ft. It seals the post top against moisture, dirt and debris and goes on with a friction fit.

Fits post size4″ x 4″ square aluminum posts
MaterialArchitectural-grade aluminum
FinishPowder-coated (black)
Install methodFriction fit; optional exterior adhesive
Screws requiredNo
UseResidential & commercial aluminum fence systems

aluminum post cap

Aluminum post cap: 4″ flat press cap

A fence post cap closes the open top of the post. On 4×4 posts, the heavy-wall posts listed as a post option for our HD sliding gates, this 4″ cap gives a flat, finished top that matches the black powder coat. Smaller posts take the 3.15″ or 2″ cap.

Where it's used

What you get, and where it goes.

Wide backyard
  • Included: 1 cap, 4″
  • 4×4 in. HD square posts, 8 ft and 11 ft
  • Gate posts on 4 in. post layouts
  • Commercial and security fence lines on 4×4 posts
  • Coastal and high-moisture environments
Square post and C-channel fence exploded drawing

How the square post system works

Square posts with C-channels hold the slats, finished with caps, spacers and base plates.

  • 2″, 3″, 3.15″ and 4″ square posts
  • C-channel kits
  • Channel and C-channel spacers
  • Flat press caps
  • Base plates

Watch the videos

See the square post system

How square posts and channels hold the slats.

How it works

How to install it.

  1. Clean the post topMake sure the top of the aluminum post is clean of dust and debris.
  2. Check fitTest-fit the cap so it aligns with the post and sits flush.
  3. Apply adhesive (optional)For extra security, put a bead of exterior-grade adhesive inside the cap.
  4. Press the cap onPress the cap down onto the post until it fits snugly and flush; a rubber mallet can help on large projects.
  5. Let it setWipe away excess adhesive and let it cure before extended exposure to bad weather.

FAQ

Questions, answered.

Which posts does the 4″ cap fit?

4″ x 4″ square aluminum posts, such as the 4x4 in. x 8 ft HD square post and the 11 ft length.

My post is smaller. Which cap do I need?

Use the 3.15 in flat press cap for 3.15″ posts or the 2 in flat press cap for 2×2 posts.

Do I need screws?

No. It presses on; use exterior adhesive for a permanent hold in high-wind areas.

How many should I order?

One per post, including gate posts.

Will it fade?

The black powder coat is made to protect against rain, snow, UV and temperature changes.

Still not sure? Call (888) 876-3006 or send us your project.

Full product description: 4″ Flat Press Cap – Black

4″ flat press cap for 4×4 posts

The 4″ flat press cap is the largest Aluglobus flat press cap. It fits 4″ x 4″ square aluminum posts, including our 4×4 HD posts, and presses on to close the post top against rain, dirt and debris. The black powder coat matches our black posts and gates.

Match the cap to the post

2″ flat press cap2″ x 2″ square posts
3″ flat press cap3×3 in. HD posts
3.15″ flat press cap3.15″ x 3.15″ light-duty posts
4″ flat press cap4″ x 4″ square posts

Smaller posts? See the 3.15 in flat press cap or the 2 in flat press cap.

Specifications

Fits post size4″ x 4″ square aluminum posts
MaterialArchitectural-grade aluminum
FinishPowder-coated, black
Install methodFriction fit; optional exterior adhesive
Screws requiredNo
Sold as1 cap

Pairs with the 4×4 in. x 8 ft HD post and 4×4 in. x 11 ft HD post.

Real projects

Aluglobus fences, installed.

Real Aluglobus projects built with this system. Every photo is shown in full; tap to enlarge.

T&G fence on square posts
ALU40 fence run
White T&G fence on a retaining wall
Side yard
Driveway run
Woodgrain fence
New build
Patio privacy

Inside the factory

See where your fence is actually made.

Inside the Aluglobus aluminum extrusion line, where the profiles for your fence are made. From there every piece goes through the 7-stage pretreatment line, the powder booths and the 110 ft cure oven. Factory direct, no middlemen.

6063-T6 USExtruded architectural aluminum
7 stagesArchitectural pretreatment before powder
110 ftCure oven, long enough for full-length profiles
NationwideFactory direct shipping to your site
Manufacturing warranty

No Factory Proof.
No Manufacturing Transparency.
No Warranty You Can Verify.

Know who manufactures your aluminum and who stands behind it.

U.S. company
U.S. warranty support
Powder coating warranty

No Coating Brand.
No Preparation Proof.
No Finish Warranty You Can Verify.

Know the coating manufacturer, the preparation process, and who's responsible for the finish.

TIGER CoatingsAkzoNobel

Inside our U.S. machine shop

Engineered first. Manufactured in-house. Built with precision.

At Aluglobus, we don't just supply aluminum systems. We engineer and manufacture the components that make them work.

Inside our U.S. machine shop we make custom aluminum parts with CNC aluminum machining, precision laser cutting and aluminum sheet metal fabrication: engineered brackets and connection plates, specialized mounting hardware and custom components for our fences, gates and architectural aluminum systems. Making them ourselves gives us more control over quality, fit and customization.

U.S.-manufactured componentsEngineered aluminum brackets, connection plates and aluminum fence hardware, made in our own machine shop.
Precision machining of an aluminum bracket and connection plate in the Aluglobus U.S. machine shop
Precision machiningCustom aluminum components machined for accurate system connections.
Precision laser cutting of aluminum sheet into mounting plates and brackets in the Aluglobus machine shop
Laser-cut aluminum partsPrecision-cut brackets, mounting plates and fabricated components.
Laser cutter control station and live cutting camera in the Aluglobus U.S. machine shop
Engineering and designTechnical design comes before precision manufacturing.
Laser-cut aluminum connection plates in the Aluglobus machine shop
Custom componentsPurpose-built aluminum brackets, connectors and mounting plates.
U.S.-based manufacturing facility

Our American machine shop manufactures aluminum components and custom parts for Aluglobus systems.

Engineered before manufacturing

Components start with technical design and engineering before they move into precision production.

Precision CNC machining

Custom aluminum parts are CNC-machined for consistent dimensions, accurate connections and dependable fit.

In-house laser cutting

Precision-cut aluminum sheets, mounting plates, brackets and specialized components.

Custom aluminum fabrication

Specialized brackets, connectors, mounting solutions and custom-designed parts made to your project requirements.

Quality control through direct manufacturing

More oversight of production for consistent components, accurate tolerances and reliable system compatibility.

Built for contractors and custom projects

Our fabrication supports aluminum fencing, gates, architectural applications and specialized installations.

A manufacturer behind the system

We show the process. So you know who stands behind the product.

Not just a supplier. From engineering drawings to finished aluminum components, we make the parts that make the system work.

Plan your fence

The right part for your fence.

Questions? Talk to a specialist
(888) 876-3006

The right part, first time

Matched to Aluglobus systems so it fits what you already have.

Ships nationwide

Factory-direct parts shipped across the U.S.

Real expert support

Send a photo of the part you're replacing and we'll confirm it.

Reviews

Real customers. Real reviews.

Homeowners and contractors on their Aluglobus fences and gates.

All reviews
Daymond JohnDAYMOND JOHNCEO, Entrepreneur and Investor
MikeMIKEHomeowner
DavidDAVIDCustomer
4.9★★★★★Google rating, 100+ reviews
Installed Aluglobus fences
Installed Aluglobus fencesInstalled Aluglobus fencesInstalled Aluglobus fencesInstalled Aluglobus fencesInstalled Aluglobus fences
Read all reviews

Moshe Perez

★★★★★

“I recently ordered an AluGlobus aluminum fence and gate kit for my property in Florida, and I couldn’t be happier with the experience. The shipping was fast and well-packaged, with everything arriving in perfect condition.”

Google review

Valley One Gates & Access

★★★★★

“We use Aluglobus 100% with every fence/gate job we have.. as a contractor i can say they are working very hard and their product is highest quality I can find ans the best price. We’re very happy working with them ! Our experience working with them is always top notch.”

Google review · Contractor

Zohar Schneider

★★★★★

“This company offers exceptional quality at unbeatable prices and provides top-notch customer service. I’ve been using them regularly for my projects in Los Angeles, and I love their aluminum gates and fences. I’ve never had any complaints, and I’m always satisfied with their work.”

Google review

Navid Kohan

★★★★★

“I’m a General Contractor I can say from quality to price to the service they give absolutely the spot for contractors. The Aluminum gate is heavy duty at the Contractor line won’t disappoint and Fencing that goes with super easy to install but super heavy duty as well Love it and will definitely see them on my next fence gate projects”

Google review · General contractor

Cristian Hernandez

★★★★★

“Just finished my first install about 200 feet fence aluminum privacy three gates and I can tell you as a contractor. This is the best system I’ve ever installed and definitely the price is right on point for this quality. […]”

Google review · Contractor

Donovan Ditden

★★★★★

“Our house has block walls on both sides and there was an awkward open section between them. They fabricated a metal fence and gate to fill the space and the fit is spot on. Looks like it was part of the original property instead of something we added later.”

Google review

Load more reviews (10)

Araceli U.

★★★★★

“Chris was amazing. He was very professional and guided us to get the perfect gates for our home. The installers were here when they said they would and worked diligently and efficiently.”

Jim Monahan

★★★★★

“AluGlobus was extremely helpful with my order, answering all my questions and delivering everything to Texas in perfect condition. The products were well-packed in a solid wood crate, and excellent quality.”

Shipped to Texas

Tiffany Salguero

28 Aug 2025

“I’m thrilled with the custom gate AluGlobus made for us. The team’s attention to detail was amazing.”

Google review

Cynthia Dalessandro

10 Sep 2025

“The AluGlobus team was fast, friendly, and professional. The gate looks beautiful, and we are very satisfied.”

Google review

Semra Sevim

8 Sep 2025

“AluGlobus was able to create a custom gate that matched our vision. The quality is outstanding!”

Customer review

Michael Sharp

16 Sep 2025

“I’m beyond impressed with the custom gate AluGlobus made for us. They delivered exactly what we asked for.”

Google review

Wendy Van Den Berg

29 Aug 2025

“Very professional and efficient installation by AluGlobus Fence. Our new gate is sturdy and looks fantastic.”

Google review

Bonnie Paulson

9 Apr 2025

“AluGlobus Fence was a pleasure to work with. The installation was fast, and the gate looks fantastic.”

Google review

Patricia Williams

12 Sep 2025

“I highly recommend AluGlobus for your gate installation. The service was quick, and the results are excellent.”

Google review

Cecil Chavez

9 Apr 2025

“AluGlobus Fence exceeded my expectations with their high-quality gates and quick installation.”

Google review

Read all 100+ reviews on Google →

See the system

Perfect aluminum fence installation technique
Perfect aluminum fence installation technique
Factory-direct aluminum fence and gate
Factory-direct aluminum fence and gate
Full front yard transformation
Full front yard transformation

Locations

Showrooms, wholesale and partners near you.

See our systems in person at an Aluglobus showroom, pick up from a wholesale location, or work with an authorized partner. Nationwide U.S. shipping from the factory everywhere else.

Project supportLos AngelesOrange CountySan DiegoBay AreaSacramentoLancasterRancho CucamongaIndioNationwide shipping
Call (888) 876-3006All contact options

Mon to Fri, 9:00 AM to 5:00 PM

Need help finding the right part?

Send your project details or a photo of the part you're replacing, and a specialist will match it for you.

Watch

See it built and installed

Installation, product and factory videos from Aluglobus Aluminum Systems.

Specifications

Technical details

Check sizes, material and configuration against your project before ordering.

Material
Aluminum 6063-T6
Finish
AAMA 2604 super-durable powder coating
Color
Black
Size
4 in.
Usage
Flat press cap for 4 in. square posts
Product views & drawings168 images

FAQ

Questions, answered

Still deciding?

Send your measurements and photos. Our team will help you choose the right system and parts.

Request a quote
Is it suitable near the coast?

Yes. The powder coat makes it resistant to salt spray and humidity.

What is it made of?

Architectural-grade aluminum with a black powder coat.

Can I use it on a 4×4 gate post?

Yes, if the post is 4″ x 4″ square aluminum. Plan one cap per post, gate posts included.

Is this a good post cap for fences?

Yes. It is part of the Aluglobus aluminum fence and gate system, so it matches our posts. Check the post size above before ordering.

What else do people call this?

Shoppers also search for it as fence caps, aluminum post caps or 4x4 post cap.

Ready when you are

Ready to start your project?

Order online or send your project details for a factory-direct quote.

Get Wholesale Pricing

Contractor or dealer pricing, or our full e-catalog. Tell us what you need and our wholesale team will get back to you.

10% off Premium Aluminum Woodgrain Collection

Limited Promotional Inventory

CONTRACTORS ONLY

Claim Your 10% Off

Send us your information and our team will help you check available woodgrain colors, profiles and current promotional inventory.

Valid on qualifying projects only. Minimum project value required. Restrictions may apply.

Aluglobus Aluminum Systems (White)

Get a free quote for your project.

Factory-direct aluminum fences, gates, patio covers and cladding. Send your sizes or a short description and our team will get back to you with pricing.

No obligation. Real people, real factory pricing.

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