This type of connector is a specialized fastener designed for creating secure, threaded connections within cylindrical tubes. Its double-layer construction and star-shaped (sunflower) design provide a strong, vibration-resistant grip that can often be adjusted by hand without tools .
Based on product listings, the main application scenarios include:
Furniture Assembly: Ideal for connecting components like table legs, chair frames, and shelving units, especially where a sleek, tool-free assembly is desired .
Bicycles and Outdoor Equipment: Commonly used for securing handlebar stems, seat posts, and other tubular connections on bicycles and outdoor gear where vibration resistance is crucial .
Industrial Machinery: Suitable for use in equipment that experiences vibration or dynamic loads, as the spring mechanism helps prevent loosening over time .
General Tube Connections: Designed to fit a wide range of tube diameters, providing a snug and secure fit for stable assembly in various mechanical or structural applications .
The products are typically made from durable materials like steel, stainless steel, or carbon steel, with surface treatments such as zinc plating, black oxide, or nickel plating to provide corrosion resistance for use in different environments, from indoor furniture to outdoor or industrial settings .
While the search results do not detail a step-by-step manufacturing guide, they reveal key aspects of the production and customization process that define the final product's quality and specifications .
The table below summarizes the key production parameters and available customizations:
The search results indicate that free samples are offered by some suppliers for this type of connector.
A supplier on Alibaba explicitly lists "free samples" as an available service for their "Double Star Tube Insert Nut" product .
For the same product, a sample price of ¥7.08 (approx. $1 USD) is listed, which is typically a nominal fee that may be refunded with a bulk order .
It's important to note that while the sample itself is free, the buyer is often responsible for paying the shipping costs. You should confirm shipping details with the specific supplier .
The terms for free samples, such as shipping costs and sample availability, can vary between manufacturers. It is always best to confirm these details directly with the supplier.
I hope this overview is helpful. If you have a specific application in mind, such as for furniture or industrial equipment, I can try to find more targeted information.
