Tube Connector – Slotted Square – 25 x 21mm

The 25 x 21mm Square Slotted Tube Connector joins two lengths of 25 x 21mm square slotted top rail into a single, continuous run. Sliding into the open end of both tubes simultaneously, it closes the gap between them and holds both pieces in precise alignment — keeping the flat faces of the square profile flush and the overall line of the rail perfectly straight.

Alignment is especially important with square profiles. Unlike round tube, where a slight rotational offset between two joined sections may go unnoticed, square tube makes any misalignment immediately visible — the flat faces must line up exactly. This connector ensures they do, holding both tube ends square to each other with no adjustment required.

No bolts or adhesive are needed. A single connector handles the joint completely.

Specifications

• Type: Tube Connector
• Profile: Square Slotted
• Tube Dimensions: 25 x 21mm
• Fitting Method: Slide-in — inserts into both tube ends simultaneously
• Units Per Pack: 1 connector (joins 2 tube ends)
• Compatible With: 25 x 21mm square slotted tube
• Finish Options: Brushed Satin | Mirror Polish
• Grade Options: 304 Stainless Steel | 316 Marine Grade Stainless Steel
• Material: Stainless Steel
• Category: Components & Fittings – Slotted Fittings

Which Grade Should I Choose?

Grade 304 is strong and reliable, suited to internal applications and external use in non-coastal, non-corrosive environments — ideal for inland areas such as Johannesburg, Pretoria, and most non-coastal suburbs.

Grade 316 (Marine Grade) offers superior corrosion resistance and is the essential choice for coastal properties, poolside installations, and any environment exposed to salt air, moisture, or chemicals. If you are in Cape Town, the Winelands, Durban, or any coastal area, Grade 316 is strongly recommended.

Installation Note

Always match your connector grade and finish to your slotted tubing for a consistent, professional result.

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