A coupling nut, also known as an extension nut, is a threaded fastener used to join two male threads, typically a threaded rod or pipe. It allows for the connection of two separate components, making it ideal for assembling long rod systems from shorter sections. The outer surface of the nut is usually hexagonal, enabling the use of a wrench for tightening.
Variations of coupling nuts include reducing coupling nuts, which connect different thread sizes; sight hole coupling nuts, designed with a small opening to monitor engagement; and left-handed coupling nuts, which are threaded in the opposite direction. These nuts are commonly used in mechanical and structural applications where strength and durability are essential.
Our company produces a wide range of cold-headed hexagon nuts, manufactured according to international standards such as DIN, ISO, ASTM, and JIS. We offer various types including standard hex nuts, castle nuts, flange nuts, nylon-insert nuts, electroplated zinc nuts, colorful zinc-plated nuts, blue zinc-plated nuts, black carbonized nuts, and hot-dip galvanized nuts. Our products are available in diameters ranging from M6 up to M48, ensuring versatility for different applications.
We specialize in high-strength nuts, with hardness grades ranging from class 4.8 to class 12.9. Our materials include 45# and 64CrMo carbon steel, as well as stainless steel options. Production methods include cold heading for smaller sizes and forging for larger, high-hardness nuts.
Our manufacturing process includes both cold heading and forging techniques. We can also customize nuts based on customer drawings or samples, offering tailored solutions for specific needs. Our production capacity ensures timely delivery, with a lead time of approximately 20 days per container.
Packaging options include plastic woven bags, cartons, and wooden pallets, ensuring safe and secure shipping. Our products are widely exported to countries such as the Czech Republic, Lithuania, Georgia, Australia, the Middle East, and Africa. We have established long-term trade partnerships with customers across the globe.
With many years of export experience, we deliver to major ports such as Qingdao, Shanghai, Ningbo, and Tianjin. Our team of professionals ensures that we provide competitive pricing, high-quality products, and reliable service. We welcome inquiries from international clients and look forward to building strong business relationships.
Explore our product range through detailed specifications, manufacturing processes, and quality assurance. Whether you need standard or custom-made nuts, we are committed to meeting your requirements with precision and efficiency. Let us be your trusted partner in sourcing high-quality fasteners for your projects.
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