This Brass Decorative Coupler, sized 20x21 M13x1, is engineered for both form and function in high-end lighting assemblies. It seamlessly connects 20mm and 21mm tubing, featuring a standardized M13x1 male thread for secure attachment to lamp components. Crafted from solid brass, it offers superior corrosion resistance and durability, while its decorative finish provides an elegant, professional touch visible in the final fixture.
Material: Solid Brass (Lead-Free)
Primary Function: Tube Adapter & Decorative Connector
Connection: Joins 20mm to 21mm tubing
Thread Type: M13x1 External Male Thread
Finish: Polished Brass (Other finishes available upon request)
Custom Chandelier Assembly: Ideal for connecting arms and central stems of varying diameters.
Pendant Light Systems: Used as a structural and decorative joint between different sections of the pendant rod.
Architectural & Commercial Lighting: Provides a reliable connection point in complex lighting structures requiring precise tube sizing.
Lamp Part Manufacturing: Serves as a standardized component for manufacturers to interface with M13x1 threaded parts.
| Specification | Detail |
|---|---|
| Model | Brass Decorative Coupler 20x21 M13x1 |
| Material | Solid Brass |
| Tube Sizes | 20mm & 21mm (O.D.) |
| Thread Size | M13 x 1mm (External) |
| Primary Finish | Polished Brass |
| Primary Use | Lighting Structure Assembly |
Precision Engineering: Ensures a perfect, seamless fit between 20mm and 21mm tubing, eliminating gaps and ensuring structural integrity.
Superior Corrosion Resistance: Made from solid brass, it withstands oxidation and tarnishing, guaranteeing long-term performance and appearance.
Enhanced Aesthetic Appeal: The decorative design transforms a simple connection into an attractive visual element of the lighting fixture.
Industry-Standard Threading: The M13x1 thread is a common standard in lamp parts, ensuring broad compatibility with other components like lamp holders and connectors.
Customer Service
With over 20 years of dedication to the lighting and hardware industry, we provide a professional and reliable supply of lighting fixture parts.Our commitment to quality and excellence is validated by international certifications, ensuring that our products meet the highest global standards for performance and safety.




Q1. Can I have a sample order for the product?
A: Yes, we welcome sample order to test and check quality. Mixed samples are acceptable.
Q2. What about the lead time?
A: 3-5 days for Sample preparing ,8-10 working days for mass production.
Q3. How do you ship the goods and how long does it take to arrive?
A: Ship by DHL, UPS, FedEx or TNT. It takes 3-5 days to arrive. Airline and sea shipping also optional.