Hex Threaded Coupling Nut for Fastener Connection

Hex Threaded Coupling Nut for Fastener Connection adopts external hexagonal body design with full-length through internal threads. The hexagonal outer surface can be clamped stably by standard open-end wrench and box wrench without slipping during installation. The internal thread is machined by precision CNC lathe with 6H tolerance grade, which fully complies with international common thread standards, and can be matched with metric full-thread studs seamlessly.

Material Selection & Surface Treatment

Hex Threaded Coupling Nut for Fastener Connection provides two mature material options for global buyers. The first one is medium carbon steel with hot-dip galvanizing or electro-galvanizing surface treatment, the coating thickness ranges from 8μm to 25μm, which can resist atmospheric oxidation for 5–10 years under normal outdoor environment. The second one is SUS304 stainless steel, featuring natural passivation surface, suitable for humid, coastal and slightly corrosive working conditions.

Ningbo Gangtong Zheli Fasteners Co., Ltd. strictly carries out raw material incoming inspection, chemical composition detection and hardness sampling test for every batch of blanks to eliminate unqualified raw materials from the source.

Application Scenarios & Assembly Advantages

Hex Threaded Coupling Nut for Fastener Connection is widely used for stud extension and butt joint connection in photovoltaic bracket systems, steel structure factory buildings, mechanical equipment frames and water treatment pipeline supports. Unlike direct butt welding of two studs, this coupling nut will not damage the thread structure of studs, and can realize repeated disassembly and adjustment during later equipment maintenance. Standard sizes are kept in regular stock.

Production & Customization Support

The whole processing flow of the product includes blank cutting, CNC turning, thread tapping, surface treatment and finished product inspection, and each procedure has independent quality inspectors for tracking records. Ningbo Gangtong Zheli Fasteners Co., Ltd. supports non-standard customization of nut total length, thread pitch and special coating according to customer drawing requirements, and provides third-party material test reports and dimension inspection reports free of charge for bulk orders.