The Square Base Flange is a high-performance anchoring fitting engineered to provide a secure and stable connection between square stainless steel tubing and flat surfaces such as floors, walls, or staircases. Its distinctive “oblong” base plate design offers an expanded mounting surface compared to standard round or square versions, significantly enhancing structural stability and weight distribution for handrail posts. Constructed from industrial-grade stainless steel, this base flange is designed for maximum durability and exceptional resistance to rust and corrosion, making it an ideal choice for both high-traffic commercial interiors and demanding outdoor environments. Available in dimensions to accommodate 25.4mm, 38.1mm, and 50.8mm tubing, these square handrail fittings feature a precision-cast collar and pre-drilled holes for a clean, professional, and weld-free installation.
|
Category |
Part NO. |
Fit for Tube
(mm) |
A (mm) |
B (mm) |
C (mm) |
□ (mm) |
Material |
Surface |
Place of Production |
|
Square Line |
ST1025 |
25.4 x 25.4
|
60 | 38 | 28 | 25.4 |
Stainless Steel 304 / 316 |
Satin or Mirror polished |
Shandong, China |
|
Square Line |
ST1038 |
38.1 x 38.1
|
78 | 56 | 30 | 38.1 | |||
|
Square Line |
ST1050 |
50.8 x 50.8
|
106 | 80 | 30 | 50.8 |
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 tube sizes can this Square Base Flange accommodate?
A: This Square Base Flange is available in three standard sizes to fit 25.4x25.4mm (1"), 38.1x38.1mm (1.5"), and 50.8x50.8mm (2") square handrail posts.
Q2. What are the benefits of the oblong base plate design?
A: The oblong shape provides an increased surface area for mounting, which enhances the lateral stability of the post and ensures a more secure attachment to the supporting structure.
Q3. What do the dimensions A, B, and C indicate on the technical drawing?
A: In the technical specifications, A represents the total length of the oblong base plate, B represents the plate width, and C indicates the overall height of the raised collar that receives and secures the square tube.
Q4. Is this base flange suitable for outdoor or coastal use?
A: Yes. For outdoor, marine, or poolside applications, specifying the SS316 grade version of these square handrail fittings is recommended due to its superior resistance to chloride exposure and salt air. SS304 remains a durable and cost-effective choice for indoor or low-corrosion environments.
Q5. How should I maintain the flange to prevent surface rust?
A: Regular stainless steel railing maintenance is essential to prevent "tea staining" or surface oxidation. It is recommended to clean the flange periodically using warm water mixed with a mild, pH-neutral soap, and to always wipe in the direction of the metal grain with a soft cloth.
Q6. Does this fitting require welding for installation?
A: No, these flanges are designed for a weld-free process. The post is typically inserted into the collar and secured using high-strength structural adhesives or internal mechanical fasteners to maintain a modern, clean aesthetic.
