

The Square Steel Tube Joiner is a precision-engineered in-line connector designed specifically to join two sections of 50.8mm x 50.8mm square stainless steel tubing in a perfectly straight line. Unlike corner or branch fittings, this tube connector is a specialized square handrail fitting used to extend the horizontal or vertical length of a handrail run across long balconies, hallways, or straight staircase sections.
Crafted from high-quality AISI 304 or 316 grade stainless steel, this joiner ensures exceptional structural stability and corrosion resistance in diverse architectural environments. Its internal sleeve design allows for a secure, flush connection that maintains the sleek, continuous profile of modern square railing systems. By facilitating a weld-free installation through the use of internal mechanical fasteners or high-strength structural adhesives, this Square Steel Tube Joiner provides a clean, professional finish while significantly reducing on-site labor time.
|
Category |
Part NO. |
Fit for Tube
(mm) |
A (mm) |
□ (mm) |
Material |
Surface |
Place of Production |
|
Tube Joiner |
ST0350
|
50.8 x 50.8 x 1.5
|
6 | 50.8 |
Stainless Steel 304 / 316 |
Satin or Mirror polished |
Shandong, China |
1. Manufacturing Process: Investment Casting + Precision Machining+Polishing
2. Application Scenario: Hotel, Villa, Apartment, Office Building, Hospital, School, Mall, Sports Venues, Leisure Facilities, Supermarket, Park, Bathroom, Outdoor, Exterior, Entry, Hall, Staircase, Gym
3. Use Place: Bridge Railings / Handrails, Deck Railings / Handrails, Porch Railings / Handrails, Stair Railings / Handrails
4. Design Style: Contemporary, Modern, European, Craftsman
5. Certificate: ISO9001:2015
6. Engineering Solution Capability: Graphic Design, 3d Model Design, Total Solution For Projects
7. Certificates: Material Certificates, Dimension Inspection Certificate
8. Lead Time : 60days batch production after square tube joiner samples approved
9. Warranty Service: 1 Year
10. After-sales Service: Online Technical Support, Return And Replacement
Q1. What tube dimensions is the Square Steel Tube Joiner compatible with?
A: This in-line joiner is specifically designed to fit square stainless steel tubing with external dimensions of 50.8mm x 50.8mm. It is engineered to slide internally into the tube ends for a seamless, flush-fit transition.
Q2. Is this joiner suitable for both indoor and outdoor use?
A: Yes, the suitability depends on the material grade selected:
Q3. Does the installation of this fitting require on-site welding?
A: No. This square handrail fitting is designed for modern, weld-free assembly. It typically utilizes internal screws or high-strength structural adhesives to bond the tubing, ensuring a secure and durable connection without the need for specialized welding equipment.
Q4. How does the joiner contribute to the safety of the railing system?
A: By providing a rigid, internal bridge between tube sections, the Square Steel Tube Joiner helps distribute loads across the entire handrail run. When properly installed, it ensures the system maintains its structural integrity and meets mandatory building code safety standards for point and line loads.
Q5. What finishes are available to match my architectural design?
A: To ensure a perfect match with your existing railing hardware, the joiner is available in two high-quality finishes: