The Square Tube Flange is a specialized, heavy-duty stainless steel fitting designed to securely terminate or mount a 50.8mm x 50.8mm square tube to walls, floors, or staircases at a fixed 37-degree inclination angle. Featuring a flat mounting plate measuring 155mm in length and 80mm in width, it is equipped with four pre-drilled, countersunk holes at the corners for a flush and clean finish with bolts or screws. To handle the unique structural stresses of an angled installation, the collar is supported by a robust gusset-style transition that distributes the load from the post directly into the base plate. This professional-grade base flange ensures exceptional durability and resistance to rust, offering both the critical structural integrity and high-end aesthetics required for high-traffic or demanding outdoor environments in modern square handrail fittings systems.
|
Category |
Part NO. |
Fit for Tube
(mm) |
A (mm) |
B (mm) |
□ (mm) |
Material |
Surface |
Place of Production |
|
Square Line |
ST1150 |
50.8 x 50.8
|
155 | 80 | 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. Installation Location: Flooring/Wall
5. Design Style: Contemporary, Modern, European, Craftsman
6. Certificate: ISO9001:2015
7. Engineering Solution Capability: Graphic Design, 3d Model Design, Total Solution For Projects
8. Certificates: Material Certificates, Dimension Inspection Certificate
9. Lead Time : 60days batch production after square tube base flange samples approved
10. Warranty Service: 1 Year
11. After-sales Service: Online Technical Support, Return And Replacement
Q1. What are the dimensions of this Square Tube Flange?
A: The mounting base plate has a length of 155mm (Dimension A) and a width of 80mm (Dimension B). The collar is designed to receive standard 50.8mm x 50.8mm square tubing.
Q2. Can the angle of this flange be adjusted?
A: No, this model is engineered with a fixed inclination angle of 37 degrees. This makes it perfect for fixed-angle stair runs or sloped railings requiring heavy-duty stabilization.
Q3. What is the purpose of the gusset transition on this flange?
A: The gusset-style transition provides necessary reinforcement for the angled collar. It distributes structural load from the post into the broader base plate, preventing metal fatigue and ensuring maximum safety.
Q4. How is the flange secured to the wall or mounting surface?
A: The flat base plate contains four pre-drilled, countersunk holes located at each corner. These holes allow the flange to be bolted or screwed down flush against a flat surface.
Q5. Is this angled flange suitable for outdoor applications?
A: Yes, its robust stainless steel construction delivers excellent durability and resistance to rust and corrosion, making it ideal for both indoor and outdoor applications.
Q6. Which material grade should be used for highly exposed outdoor projects?
A: For standard interior installations, AISI 304 stainless steel provides excellent performance. For exterior, marine, or poolside environments, AISI 316 is highly recommended to protect against chloride exposure and coastal corrosion.
Q7. How should I clean and maintain this fitting?
A: To protect the surface from "tea staining" and oxidation, clean it periodically with a mild, pH-neutral soap and warm water. Always wipe in the direction of the metal grain and avoid using abrasive steel wool or carbon steel brushes.
