Stainless Steel Square Tube Connector – Rustproof Flange Base

Heavy-Duty Stainless Steel Square Tube Connector & Flange Base

Build stronger, cleaner structures with this premium stainless steel square tube connector. Engineered for metalworking, DIY fabrication, and cabinet construction, this versatile flange base and elbow corner joint delivers a secure, rustproof connection every time. Whether you're assembling furniture frames, shelving units, handrails, or custom cabinet structures, this connector set offers the rigidity and finish your project demands.

Key Features

• Material: High-grade stainless steel — rustproof, corrosion-resistant, and built for long-term durability indoors or outdoors
• Compatible Tube Sizes: Fits 20mm (0.79"), 25mm (0.98"), 30mm (1.18"), and 40mm (1.57") square tubes
• Heavy-Duty Construction: Thick-walled design handles substantial structural loads without flexing or deforming
• Versatile Application: Ideal for elbow corner joints, flange base mounts, cabinet frames, workbenches, display racks, and more
• Easy Installation: Comes with mounting screws included — no extra hardware needed to get started
• Clean Finish: Smooth brushed surface gives any project a professional, polished look

Specifications

• Type: Square Post / Tube Connector Flange Base
• Material: Stainless Steel
• Compatible Tube Sizes: 20 / 25 / 30 / 40 mm
• Quantity: 1 pc (with screws)
• Country of Origin: Made in China

What's in the Box?

• 1 × Square Tube Connector / Flange Base
• Mounting screws included

Please Note

Due to variations in camera equipment, lighting conditions, and display settings, the item's color may appear slightly different from images shown. Please allow a manual measurement tolerance of 1–2 cm (0.39–0.79 in).

Complete Your Workshop

Looking for more precision tools and storage solutions for your DIY projects? Check out our Leather Hole Punch Tool | DIY Stitching Punch 4/5/6mm and keep your project supplies neatly organized with our Airtight Transparent PET Storage Bottle | Beads & Crafts. For safe and tidy storage of small hardware, explore our Vintage Baroque Embossed Metal Tray – Jewelry & Decor Organizer.

Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

Q: What square tube sizes does this stainless steel flange base connector fit?

A: This connector is compatible with four square tube sizes: 20mm (0.79"), 25mm (0.98"), 30mm (1.18"), and 40mm (1.57"). Be sure to select the size that matches your square tube when ordering.

Q: Is this square tube connector suitable for outdoor use?

A: Yes. The connector is made from high-grade stainless steel, which is naturally rustproof and corrosion-resistant, making it well-suited for both indoor and outdoor structural applications such as railings, garden frames, and outdoor shelving.

Q: Does this connector come with the screws needed for installation?

A: Yes, each connector includes mounting screws in the package, so you can begin installation right away without purchasing additional hardware.

Q: Can this flange base connector be used for cabinet construction?

A: Absolutely. The square tube flange base connector is ideal for cabinet frames, furniture structures, workbenches, and display racks. Its heavy-duty construction ensures a firm, stable joint for load-bearing applications.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.