Description
Product Overview
The GBGS Chain Link Fence Post Floor Flange is engineered to provide a reliable, heavy‑duty mounting solution for 1‑5/8″ outer‑diameter (OD) fence posts. Constructed from low‑carbon steel that has been electro‑galvanized, the flange offers superior corrosion resistance, ensuring long‑term performance even in harsh outdoor environments. The base plate measures 3‑5/8″ OD with a height of 3‑1/2″ and a thickness of 4.4 mm, while the surrounding wall is 2.6 mm thick, delivering a robust structural profile that can withstand the forces exerted by wind, tension, and regular use.
Designed with practicality in mind, the flange includes four pre‑drilled holes, each Ø10.3 mm, compatible with standard 3/8″ bolts. These holes are strategically positioned to allow for secure anchoring into concrete, while also providing a bottom hole that prevents the flange from sitting directly on the ground, reducing moisture accumulation and potential rust formation. The product dimensions are compact at 8.07 x 6.14 x 4.17 inches, weighing just 4.12 pounds, making it easy to handle during installation.
Beyond its technical specifications, the GBGS flange is versatile enough to be used for a variety of applications, including fence posts, mailbox supports, pergola railings, and deck structures. Its design ensures a stable, level foundation that distributes load evenly, reducing stress on the post and extending the lifespan of the entire assembly. With a customer rating of 4.9 out of 5 stars from nine reviews, the flange has proven its reliability and value to DIY enthusiasts and professional contractors alike.
![[Product front view showing all components]](https://www.avmira.store/wp-content/uploads/2026/08/c00d43f4477d4708853e34c0aec709d6.jpg)
Usage
When installing a chain‑link fence, the flange serves as the critical interface between the vertical post and the concrete footings. By positioning the flange on a prepared concrete pad and securing it with the pre‑drilled bolt holes, installers achieve a flush, level connection that prevents post wobble and ensures the fence remains taut over time. This same method applies to mounting mailbox posts, where a stable base is essential to keep the mailbox upright and resistant to wind gusts.
For pergola railings and deck projects, the flange provides a sturdy anchor point that can support the additional weight of decorative elements, lighting fixtures, or climbing plants. Its electro‑galvanized coating protects against rust, making it suitable for coastal regions or areas with high humidity. Whether you are a homeowner tackling a weekend DIY project or a contractor handling a larger commercial installation, the GBGS flange simplifies the process and delivers consistent results.
Why Choose Us
GBGS is a trusted brand in the building supplies market, known for delivering high‑quality hardware that meets rigorous industry standards. Each flange undergoes a thorough quality‑control process, from material selection to final coating, ensuring that every unit shipped meets the promised durability and performance criteria. The electro‑galvanized finish not only enhances corrosion resistance but also provides a sleek, professional appearance that complements any outdoor construction project.
In addition to product excellence, GBGS offers responsive customer support and a clear warranty policy. Should you encounter any issues during installation or have questions about compatibility, our dedicated support team is ready to assist, reinforcing our commitment to customer satisfaction and long‑term partnership. Choosing GBGS means investing in a product that combines engineering precision with practical usability, backed by a brand that stands behind its solutions.
Key Features
- Electro‑galvanized low‑carbon steel resists rust for lasting outdoor use
- Four pre‑drilled Ø10.3 mm holes simplify secure bolt attachment
- Robust 4.4 mm base thickness distributes load evenly for stability
- Compact dimensions and lightweight design make handling easy
- GBGS customer support ensures assistance and warranty coverage
FAQ
What post sizes are compatible with this flange?
The flange is designed to fit posts with a 1‑5/8″ outer diameter, which is a common size for residential chain‑link fencing and related applications.
Can the flange be used on uneven ground?
Yes. By setting the flange on a level concrete pad and using the pre‑drilled bolt holes, you can achieve a stable, level installation even if the surrounding terrain is not perfectly even.
Is the electro‑galvanized coating sufficient for coastal environments?
The electro‑galvanized finish provides strong corrosion resistance, making the flange suitable for coastal areas, though additional protective measures such as sealants can further extend its lifespan.
How many bolts are needed to secure the flange?
Four bolts, one for each pre‑drilled hole, are recommended to ensure a balanced and secure attachment to the concrete footing.
What warranty does GBGS offer on this product?
GBGS provides a limited warranty covering manufacturing defects for a period of one year from the date of purchase, along with access to technical support for installation guidance.




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