Adjustable flush elbow

The Strofix adjustable flush elbow is an AISI 304 stainless-steel variable-angle connector for 40 × 40 mm square railing tubes, with an adjustment range of 90° to 180°. The elbow has a 27 mm height (H) and is supplied in satin finish. Attached using adhesive (elements for pasting included).

The adjustable elbow sleeves over the ends of two 40 × 40 mm square tubes and allows the angle between them to be set anywhere from 90° (right angle) to 180° (straight-line continuation) during installation. This covers all common handrail transition angles: staircase pitches, ramp inclines, slight directional adjustments, and obtuse corners. The "flush" design creates a smooth, uninterrupted surface at the joint — the elbow encloses the tube ends internally, so no bracket or clamp is visible on the outside. At 27 mm height, this elbow has a lower profile than the fixed 90° flush elbow for the same tube (H = 45 mm), creating a more compact joint appearance. 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:

• Staircase handrail angle transitions with 40 × 40 mm square tube
• Ramp handrail incline adjustments between 90° and 180°
• Obtuse corner turns on square tube balcony and terrace handrails
• Slight in-line directional adjustments on square tube railing runs
• Any 40 × 40 mm square tube joint where a variable angle between 90° and 180° is required

FAQ:

What tube does this elbow fit?

The adjustable flush elbow fits the 40 × 40 mm square tube — the standard square railing tube in the Strofix product range.

What is the angle adjustment range?

The elbow adjusts from 90° (right angle) to 180° (straight line). This covers all common handrail transition angles including staircase pitches, ramp inclines, and obtuse corners.

What is the elbow height?

The elbow has a 27 mm height (H = 27 mm). This is lower-profile than the fixed 90° flush elbow for the same tube (H = 45 mm).

How does this differ from the fixed 90° flush elbow for 40 × 40 mm tube?

The fixed 90° elbow has a permanent right-angle joint with a 45 mm height. This adjustable elbow can be set to any angle between 90° and 180° and has a lower 27 mm height. Use the fixed version for standard right-angle corners; use this adjustable version for staircase transitions, ramp angles, and non-standard turns.

How does this compare to the adjustable flush elbow for round tube?

This elbow fits the 40 × 40 mm square tube. The round-tube adjustable flush elbow (SKU LS4247S) fits the Ø42.4 mm round tube with a 47 mm height. Both are adhesive-fixed and variable-angle. Choose based on the tube profile used in the railing system.

How is the elbow attached?

The elbow is secured using adhesive (pasting). Set the two tubes to the desired angle inside the elbow body, then apply the adhesive. The Strofix anaerobic glue (50 mL) is the recommended adhesive.

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.