303 Stainless Steel M6 Free-Cutting Through Hole Hex Nut for Automation

Situo Hardware specializes in the production of 303 stainless steel through hole nuts, M6 precision hex nuts and free-cutting through thread fasteners. Focusing on precision mechanical accessories, our products are widely used in automation equipment, precision instruments, electromechanical control equipment and tooling jigs.

This series of SUS303 M6 through hole hex nuts adopts high-quality free-cutting 303 stainless steel material. Compared with ordinary 304 stainless steel, 303 material features excellent cutting performance, smooth processing texture and high dimensional accuracy, which is very suitable for precision equipment non-standard customization. The full through-hole thread design realizes complete penetrating assembly, adapting to full-thread screw penetration and long bolt locking scenarios. With neat hex shape, flat end face and burr-free thread, the nuts ensure tight fitting and stable locking during repeated assembly and disassembly. Standard M6 specifications are in stock, and full non-standard customization is available according to drawings and samples.

• Premium 303 Free-Cutting Material, High Precision Texture: Made of genuine SUS303 free-cutting stainless steel with uniform and dense texture. It delivers excellent machining performance with smooth surface and fine texture after precision turning, effectively avoiding burrs and thread deformation.
• Full Through-Hole Thread, Universal Penetrating Assembly: The complete through thread structure allows full penetration of threaded rods and long bolts, supporting bidirectional assembly and penetrating locking. It solves the assembly limitation of blind hole nuts.
• Excellent Rust & Corrosion Resistance, Durable Operation: 303 stainless steel has outstanding anti-rust, anti-oxidation and moisture-proof performance. It is not easy to rust or seize in humid, dusty and slightly corrosive workshop environments.
• Standard Hex Structure, Easy Installation & Strong Versatility: Processed strictly in accordance with industrial hex standards with uniform stress-bearing surfaces. Compatible with standard sleeves, wrenches and pneumatic tools.
• Precision Thread Processing, Smooth Meshing & Anti-Slip: Adopting precise thread turning and rolling technology, the M6 thread pitch is standard with full tooth shape and no burrs. The screw fits smoothly without jamming.
• CNC Precision Machining, Stable Batch Consistency: Full CNC precision machining ensures strict tolerance control of verticality, parallelism and concentricity. Each batch of products features unified size and strong interchangeability.
• Full Non-Standard Customization: Customizable thickness, outer diameter, fine/coarse thread, chamfer and special limit structure based on M6 specifications. Supporting both small-batch sample orders and large-batch mass orders.

We specialize in customized production of 303/304/316 stainless steel precision fasteners, focusing on precision accessory supporting for automation equipment. Full production workflow: material screening → CNC precision turning → thread processing → hex & end face finishing → deburring & polishing → full dimension inspection → thread gauge detection → packaging & delivery.

Standard M6 303 through hole nuts are in stock with fast delivery, and non-standard products support rapid sample making and mass production. We provide complete material test reports and quality certificates, supporting engineering bulk packaging and export-grade packaging, offering one-stop precision fastener customization solutions.

We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs. Our maximum processing outer diameter is 60, and the minimum control tolerance is 0.001.

Our company has a total of 300 employees, including 20 technicians, 10 engineers, and 15 quality control personnel. We have over 300 pieces of equipment. Our company implements 8S management and has passed ISO9001 and TS16949 automotive certifications.

Our customers include Bo-Sch, Foxconn, Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, and Cater-pillar.