Customized Screw Service: Offers versatile options for customer-specific needs.
Head-Style Customized: Tailored head styles for diverse applications.
Surface Treatment Customized: Available in various finishes to meet specific requirements.
Quality Assurance: Meets international standards like ISO9001, ISO14001, and IATF16949.
Production Range: Capable of producing M1-M22 screws, M2-M16 nuts, and various gaskets.
Sems Screw (or Sem Screw) is a pre-assembled fastener with captive washers, streamlining assembly and reducing FOD risks. Our product range covers Stainless Steel Sems Screws (corrosion-resistant for harsh environments), Phillips Sems Screws (easy torque application), hex sems screw (heavy-duty strength), sems machine screw and sems machine screws (precision for machinery), and sems socket head cap screw (high-torque scenarios like PCB fixing).
🏭With two production bases (8,000㎡ in Dongguan, 12,000㎡ in Lechang) and full-auto workshops (screw, washer, lathe, nut, stamping), we produce M1-M22 sems screws and custom parts.
🔬Strict quality control includes 10+ optical sorters (600pcs/min inspection), full visual inspection, and a lab with hardness testers, torque meters, tensile machines, and X-ray fluorescence spectrometers (for eco-testing), ensuring 100% defect-free products.
Certified ISO9001, ISO14001, IATF16949 and recognized as a High-Tech Enterprise, our products meet REACH/ROHS standards, exported to 40+ countries and trusted by Xiaomi, Huawei, SONY. We offer one-stop solutions, pre-sales R&D, and after-sales support. Choose our sems screws—backed by mature supply chains and professional teams—to cut assembly time, reduce errors, and exceed your quality expectations.
Frequently Asked Questions
Q
What is a Sems Screw and what are its main advantages?
A Sems Screw (also called a Sem Screw) is a pre-assembled fastener that combines a screw with one or more captive washers. Its main advantages include streamlined assembly processes, reduced risk of Foreign Object Damage (FOD), time savings on production lines, and consistent torque performance across applications.
Q
What types of Sems Screws do you offer?
We offer a comprehensive range including Stainless Steel Sems Screws, Phillips Sems Screws, Hex Sems Screws, Sems Machine Screws, and Sems Socket Head Cap Screws. We also provide fully customized options in terms of head style, material, surface treatment, and size from M1 to M22.
Q
What surface treatment options are available for your screws?
We offer a wide variety of surface treatments to suit different environmental and aesthetic requirements, including zinc plating, nickel plating, black oxide, hot-dip galvanizing, phosphating, and more. Custom surface finishes can also be arranged based on your specific application needs.
Q
What quality certifications and standards do your products comply with?
Our manufacturing facilities are certified under ISO9001 (Quality Management), ISO14001 (Environmental Management), and IATF16949 (Automotive Quality). Our products also comply with international environmental regulations including REACH and RoHS standards, and we are recognized as a High-Tech Enterprise.
Q
Do you support custom orders, and what is your production capability?
Yes, we fully support OEM and custom orders. With two production bases totaling over 20,000㎡ and fully automated workshops, we can produce M1-M22 sems screws, M2-M16 nuts, and various gaskets. Our inspection line runs at 600 pieces per minute using 10+ optical sorters, ensuring both high volume and consistent quality.
Q
Which countries do you export to, and who are your major clients?
We export to over 40 countries worldwide and have established long-term partnerships with globally recognized brands including Xiaomi, Huawei, and SONY. Our one-stop service covers pre-sales R&D consultation, production, and comprehensive after-sales support to ensure full customer satisfaction.
