Premium Metric Stainless Steel Hex Sems Screws | Terminal / Double / Vibration Resistant Captive Sems Machine Screws

Sems screw, also known as pre-assembled combination screw, is an integrated fastener that combines screw body and washers into one finished part. We are a professional manufacturer and factory located in China, focusing on the R&D, production and supply of various standard and custom sems screws for global industrial customers.

Our main product lineup covers hex sems screw, terminal sems screw, stainless steel sems screw, metric sems screws, double sems screw and vibration resistant captive sems machine screws. All products follow international metric standards, with complete specifications and reliable interchangeability, which can perfectly match most industrial equipment, electronic products and assembly lines worldwide.

We adopt high-quality raw materials as standard configuration. The mainstream material is 304 and 316 stainless steel, featuring excellent rust resistance, corrosion resistance and oxidation resistance, suitable for humid, outdoor and corrosive working environments. We also provide carbon steel materials for cost-effective projects. Multiple surface treatments are optional, including passivation for stainless steel, zinc plating, nickel plating and black oxide finish. Strict surface processing effectively enhances the wear resistance and service life of the screws.

We supply two classic structures: single washer sems screw and double sems screw with two assembled washers. The integrated one-piece design avoids the problem of loose or lost gaskets during high-speed assembly, greatly improving production efficiency. Specially designed vibration resistant captive sems machine screws adopt anti-loosening structure, which can keep stable fastening state for a long time under continuous vibration, shaking and dynamic load conditions, and will not fall off or loosen easily. The hex drive design ensures large fastening torque, smooth installation and no slipping. Our dedicated terminal sems screw is optimized in size and structure for electronic terminal connection, with precise thread and stable contact performance.

All our metric sems screws are produced in strict accordance with metric thread standards. Conventional sizes range from M2 to M10, and we can also develop non-standard sizes according to customer requirements. As a reliable sems screws supplier and factory, we fully support custom sems screws and OEM sems screws. We can customize head type, drive type, thread length, washer quantity, material grade and surface finish based on your drawings, samples or technical parameters. Whether it is small-batch trial production or large-scale mass orders, we can meet your demands flexibly.

These high quality sems screws are widely used in various industries. They are the ideal fasteners for electronic terminals, household appliances, communication equipment, industrial automation machinery, automotive parts, instrumentation, cabinet assembly and daily hardware products. Thanks to stable quality and diverse styles, our sems screws have been exported to many countries and regions, and won consistent recognition from overseas buyers.

As a professional China sems screws factory and manufacturer, YH Fastener owns fully automatic production lines, complete testing equipment and a strict quality control system. Every batch of products will go through raw material inspection, production process inspection and finished product full inspection before delivery. We guarantee stable product quality, reasonable factory direct price and on-time delivery. From technical consultation, sample making to mass production and after-sales service, YH Fastener provides one-stop supporting services for all partners.