Square Nut

The Stainless Steel Square Weld Nut is a durable and reliable spot welding fastening solution designed for permanent thread fixing on thin sheet metal in automotive, electrical equipment, cabinet and general machinery manufacturing applications. Featuring a square body with four integrated welding projections and precision internal thread, this weld nut creates a stable threaded base after spot welding, preventing nut displacement and falling off under vibration while simplifying assembly procedures for mass production lines.

Manufactured from premium 304 or 316 stainless steel, the square weld nut delivers excellent tensile strength, impact resistance and long-term rust-proof durability. The surface adopts professional polishing and passivation treatment, forming a dense anti-corrosion protective film that effectively resists oxidation, moisture and mild chemical erosion. These protective finishes extend service life greatly and maintain stable performance in damp, indoor and light outdoor operating environments.

Four built-in welding protrusions on the square base ensure fast, firm spot welding connection with metal plates, avoiding welding deviation and weak bonding problems. Precision tapped internal thread matches standard bolts smoothly, providing consistent clamping force to reduce vibration loosening risk and improve overall product assembly safety. This integrated one-piece structure eliminates separate nut installation steps, shortens production cycle and lowers labor cost for automatic assembly workshops.

Square weld nuts are widely applied to automotive sheet metal frames, electrical control cabinets, mechanical equipment housings, household appliance shells, metal furniture and all kinds of thin-plate linkage assembly systems. Its permanent welding fixation and corrosion-resistant stainless steel material make it ideal for mass production projects requiring stable built-in threaded connection.

We provide OEM and ODM manufacturing services and support custom production according to customer drawings, samples, or special specification requirements. Custom thread sizes, nut thickness, projection height, stainless steel grades and customized packaging options are available to meet unique project demands. Private labeling and custom branding printing services are also supported for hardware distributors, auto parts factories, electrical manufacturers and sheet metal processing plants.

Each stainless steel square weld nut is manufactured under strict quality control standards and undergoes comprehensive dimensional inspection, thread precision test and welding stability sampling test before shipment to ensure dimensional accuracy, smooth thread texture and reliable welding performance for every product batch.