Flush elbow (90°)

The Strofix flush elbow (90°) is an AISI 304 stainless-steel fixed right-angle connector for 40 × 40 mm square railing tubes. The elbow has a 45 mm height (H) and creates a smooth, flush-profile 90° corner joint between two square tube sections. Supplied in satin finish. Attached using adhesive (elements for pasting included).

The flush elbow sleeves over the ends of two 40 × 40 mm square tubes at a fixed 90° angle, creating a clean right-angle turn for handrails, top rails, and other square tube railing elements. The "flush" design encloses the tube ends internally, so the external surface at the joint is smooth and continuous with no visible bracket or clamp. The fixed 90° angle is used for standard horizontal-to-vertical transitions, balcony corners, and level handrail direction changes. The 40 × 40 mm specification matches the Strofix square tube from the Pipes, bars range. AISI 304 stainless steel is suitable for standard interior and exterior installations.

The satin finish provides a uniform appearance that matches other Strofix satin-finished railing components.

Use cases:

• Right-angle corners on 40 × 40 mm square handrails and top rails
• Balcony railing corner turns with square tube profiles
• Horizontal-to-vertical square tube transitions at railing ends
• Level direction changes at 90° in square tube railing systems
• Clean, flush-profile corner joints without visible hardware

FAQ:

What tube does this elbow fit?

The flush elbow fits the 40 × 40 mm square tube — the standard square railing tube in the Strofix product range. It is not compatible with the Ø42.4 mm round tube.

What is the elbow angle?

The elbow has a fixed 90° angle. It cannot be adjusted. For variable-angle connections with 40 × 40 mm square tube, see the adjustable flush elbow for square tube in the Strofix Elbows, Connectors category.

What is the elbow height?

The elbow has a 45 mm height (H = 45 mm).

How is the elbow attached?

The elbow is secured using adhesive (pasting). The Strofix anaerobic glue (50 mL) from the Chemistry, Adhesives subcategory is the recommended adhesive.

How does this differ from the adjustable flush elbow for round tube?

This elbow is for the 40 × 40 mm square tube at a fixed 90° angle. The adjustable flush elbow (SKU LS4247S) is for the Ø42.4 mm round tube at a variable angle. Choose based on the tube profile used in the railing system and whether a fixed 90° or adjustable angle is needed.

What does "flush" mean?

"Flush" means the elbow creates a smooth, uninterrupted surface at the joint. The elbow encloses the tube ends internally, so no bracket, clamp, or protruding hardware is visible on the outside.

About Elbows & Connectors

Elbows and connectors are stainless-steel joint fittings that link two sections of handrail or railing tube at a change of direction, creating a continuous, seamless-looking rail line around corners, up staircases and across straight joints. Flush elbows and angles slip over the tube ends and produce a smooth, weld-free joint on the visible surface; welding variants are permanently fused for a rigid connection.

Strofix supplies 15 elbow and connector products for Ø42.4 mm round pipe and 40×40 mm flat square tube, including fixed 90° flush angles, adjustable flush elbows (with one variant covering 0–70°), cross flush angles, tee ("T") connectors, tee corner connectors, inline fittings and welding flush angles — all in AISI 304 stainless steel with a satin finish, with AISI 316 and polished options on selected variants.

The correct fitting depends on tube profile, the angle of the direction change, the number of tube arms meeting at the joint and whether a screwable or welded connection is required.