$25.20
Sign Up for Wholesale Discounts!
Fast & Reliable Delivery to Your Job Site!
Built for Strength & Durability!
The 2.75″ Flat Aluminum Post Cap is a clean, low-profile finishing piece made for true 2-3/4″ square aluminum posts. If you want a modern look without the bulky pyramid style, this flat-top cap delivers a crisp, architectural finish and real protection. The cap seals the open post to keep out rain, debris, and insects—the exact things that shorten a fence’s life. Manufactured from quality aluminum and finished with a durable powder coat, it handles year-round weather, daily sun, and regular washing without rusting or flaking. Use it to complete new installs or refresh older lines where missing or damaged caps make a good fence look unfinished.
This model is designed for 2.75″ x 2.75″ square aluminum posts (often listed as 2-3/4″). The interior is engineered for a snug, secure press fit on properly sized aluminum posts. If you’re matching existing hardware, measure the outer width of the post with a caliper or tape to confirm it is a true 2.75″ square. While some users adapt these caps to other materials with the same profile, the best fit and long-term performance are on aluminum systems. If your project mixes sizes, make sure to order the correct cap per line to keep the top line straight and consistent.
A high-quality powder-coat gives this cap its smooth, uniform finish and serious outdoor durability. Powder coating bonds to the aluminum and resists UV fading, moisture, and surface corrosion better than basic paint. That matters in hot sun, around chlorinated pools, and especially in coastal regions where salt air destroys cheaper finishes. Wipe it down during routine fence cleaning and it will keep the same deep color and clean edges season after season.
Use the 2.75″ flat aluminum post cap anywhere you want a modern, squared-off aesthetic with reliable protection. Homeowners choose it for contemporary backyard fences and privacy lines where every post needs a flush, minimalist finish. Contractors spec it for commercial perimeters and multifamily properties because it looks professional and installs fast at scale. The cap excels near pools, patios, and landscaped areas that see frequent watering or splash-back, since sealing the post prevents standing water inside the tube. It’s also a smart choice for coastal projects; aluminum with a quality powder coat stands up to humidity and salt spray far better than raw steel or painted alternatives. Whether you’re completing a new build or bringing an older fence back to life, topping every post with a flat aluminum cap immediately improves curb appeal and extends the system’s service life.
Installation is straightforward. Clean the top of the 2.75″ post so it’s dry and free of dust or metal shavings. Align the cap and press it straight down until it sits flush; most runs don’t require tools. In high-wind zones, busy gate areas, or public installations, add a small bead of exterior-grade construction adhesive inside the cap before seating it to create a permanent bond that won’t creep over time. If you’re tapping the cap into place, use a rubber mallet and light, even strikes to avoid marring the finish. Wipe any squeeze-out immediately and give adhesive the full cure time listed by the manufacturer before heavy use.
There’s almost nothing to do. During normal fence washing, rinse the caps with low pressure and a mild soap solution, then dry with a soft cloth if you want a showroom look. Avoid harsh solvents or abrasive pads that can dull the powder-coat sheen. Check gate posts once or twice a year; if you skipped adhesive and see movement, pop the cap off, add a thin bead, and reseat it.
Yes. This cap is engineered for true 2.75″ (2-3/4″) square aluminum posts and seats with a snug, secure fit when the post is measured correctly.
It’s powder-coated, which holds color, resists UV fade, and protects the aluminum from corrosion much better than basic paint.
Yes. Powder-coated aluminum is ideal for coastal climates and pool environments because it resists salt, humidity, and chemical splash.
No. A clean press fit is usually enough. For permanent security on gate posts or windy sites, use a thin bead of exterior construction adhesive inside the cap before seating it.
It’s designed for aluminum. If another post has a true 2.75″ square profile, you may be able to adapt it, but the best fit and longevity are on aluminum systems.
Order one cap for every post in your line, including hinge and latch posts at gates, so the top line is continuous and finished end-to-end.
Log in