Sems Screws | Custom & Wholesale | Factory Direct Manufacturer

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.