Square Weld Nut

Handan Hengmai Fasteners Manufacturing Co., Ltd. is one of the most reliable manufacturers and suppliers of square weld nut in China. As we have world-leading production equipment and strong manufacturing capabilities, we warmly welcome you to buy bulk high quality square weld nut for sale here from our factory. Customized orders are welcome.

Square Weld Nuts are specialized permanent fastening fasteners designed for sheet metal welding and chassis assembly, manufactured in accordance with DIN928 and industrial GB standards. Unlike traditional hex nuts for bolt assembly, square weld nuts feature a flat square base with four positioning corners, which realizes precise positioning and full-surface spot welding on thin steel plates, iron shells and metal profiles. The product is processed by precision cold forging with flat and smooth welding surface, no burrs or deformation, ensuring firm fusion with metal substrates after welding without virtual welding or shedding. Our factory provides full metric specifications, conventional electro-galvanized and black oxide treatments, and supports customized thickness and hole spacing, serving automotive sheet metal, electrical cabinet manufacturing and hardware engineering projects worldwide.

1. The unique square planar structure provides larger welding contact area than ordinary nuts, forming a tight fusion layer with sheet metal after welding, effectively avoiding loose connection and falling off during long-term equipment vibration.

2. Integrated cold forging molding ensures uniform flatness of the welding surface, no warping or deviation, which greatly improves the yield of automatic welding production lines and reduces post-weld correction processes.

3. Standard precision internal thread ensures smooth matching with standard bolts; the thread will not be deformed or blocked during high-temperature welding, ensuring subsequent assembly accuracy.

4. Low-carbon steel material has good weldability, no welding spatter or brittle cracking, adapting to industrial batch spot welding and laser welding processes.

Square weld nuts are core supporting fasteners for sheet metal processing industries, widely used in automotive body and chassis sheet metal fixing, electrical distribution cabinet shell assembly, mechanical equipment casing connection, furniture hardware welding, elevator accessory processing and communication equipment shell fastening. They are the preferred permanent connection solution for thin metal parts that do not allow penetrating bolt installation.

We implement full-process quality inspection for square weld nuts. Each batch undergoes flatness detection, thread go/no-go gauge inspection, dimensional tolerance calibration and welding tensile test. The factory strictly controls the flatness of the welding bottom surface to ensure no gaps during lamination. Electro-galvanized products pass salt spray anti-corrosion testing, and raw material quality certificates are completely archived. SGS third-party test reports can be provided for bulk orders to support project bidding and quality verification.

Standard packaging: inner moisture-proof PE plastic bags + outer thickened woven bags, pallet integrated packaging for sea freight to avoid extrusion deformation. Small-batch customized orders can use carton packaging with customized shipping marks. The products should be stored in a dry and dust-free warehouse to prevent surface oxidation and oil contamination, ensuring no impact on subsequent welding firmness. We provide FOB, CIF, DDP multi-dimensional logistics solutions with stable and controllable delivery cycle.

Our professional pre-sales team can recommend the most suitable surface treatment and thickness specification according to your welding process and usage environment. If product flatness deviation or thread defects caused by factory quality problems occur after arrival, we support free replacement and bear all related logistics costs. We also provide professional welding installation tips to help customers improve assembly efficiency.

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