News - China Screw Factory:Every screw must undergo strict quality inspection

As trusted China Machine Screw Suppliers, we at Dongguan Yuhuang Electronics Technology Co., Ltd. prioritize uncompromising quality in every product—from China Supply Cross Machine Screw to Anti Loose High Quality Wholesale Screw. Our rigorous quality inspection process, backed by ISO9001, ISO14001, and IATF16949 certifications, ensures each screw meets global standards for precision, durability, and reliability.
1.Optical Inspection: Precision at Every Detail

Our advanced optical inspection systems utilize high-resolution imaging and AI-driven analysis to examine critical dimensions of screws, including pan head screws, cross machine screws, and custom anti-loose designs. This technology checks thread pitch, head diameter, and shank straightness with micron-level accuracy, ensuring compliance with GB, ANSI, DIN, and ISO standards. For China Pan Head Screw Factory products, optical inspection verifies consistent head shape and recess depth, key for seamless installation in 5G communications, consumer electronics, and automotive parts.
2.Hardness Testing: Strength You Can TrustTo guarantee that our Anti Loose High Quality Wholesale Screw and standard screws withstand extreme loads, we perform rigorous hardness testing using Rockwell and Brinell methods. Each batch undergoes sampling to measure resistance to deformation, ensuring screws retain integrity in high-torque applications like aerospace and industrial machinery. This step confirms that even custom non-standard screws meet the strength requirements of our partners, including Xiaomi, Huawei, and SONY.
3.Manual Inspection: Skilled Expertise in Every Check

Complementing automated systems, our team of skilled technicians conducts detailed manual inspections. They examine surface finishes, plating uniformity, and anti-loose features—such as thread-locking coatings or deformed threads—critical for screws used in vibration-prone environments like new energy equipment and medical devices. For China Supply Cross Machine Screw products, manual checks ensure the cross recess is perfectly aligned, preventing driver slippage during installation.
4.Salt Spray Testing: Corrosion Resistance for Global Markets

Our salt spray testing simulates harsh environmental conditions, exposing screws to saltwater mist for 48–1000 hours to validate corrosion resistance. This is especially vital for Anti Loose High Quality Wholesale Screw destined for marine, outdoor, or humid applications. All products pass REACH and RoHS standards, ensuring they meet strict environmental regulations in Europe, North America, and the Middle East.

With two production bases (8,000㎡ in Dongguan and 12,000㎡ in Lechang) and a full range of testing equipment, we deliver consistent quality across all products. As your reliable China Pan Head Screw Factory and China Machine Screw Suppliers, we combine technical expertise with strict quality control to offer screws that excel in performance. Contact us for tailored solutions backed by decades of industry experience.