SEMS Screws | Pre-Assembled Washer & Screw Fasteners for Industry

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SEMS Screws | Pre-Assembled Washer Screws for Faster, Secure Assembly

SEMS Screws | Pre-Assembled Washer Screws for Faster, Secure Assembly

Stop fumbling with separate parts! Our SEMS screws come with a pre-assembled washer (free-spinning or captive) for faster, more reliable assembly. Reduce labor costs and prevent loose washers. Shop our full range today!
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Advantages of

Reliable Delivery At Both Locations

Dual-base large-scale manufacture The dual bases cover a total production area of 20,000 square meters for efficient mass production and delivery. Full-chain quality control system Completely certified and completely tested, constant quality, compliance, and meeting standards.

Non-Standard Customized Fasteners

Full coverage of all types of products Screws, washers, nuts, precision parts for many industries. ​ Non-standard customized and technological obstacles overcome. With 30 years of experience in customizing screws and other types of hardware parts, we relieve hard problems.

Global Wide-Area Application

Global market layout Exported in more than 40 countries, international cooperation guaranteed to complete delivery. ​ In-depth application of multiple industries To famous enterprises serving 5 or more high precision fields.

Full-Cycle Excellent Service

Full-process service guarantee Full-process service to guarantee a pleasant cooperate experience. ​ Customized value-added service Joint reasearch satisfying demands for the entirety of process.

SEMS Screws | Pre-Assembled Washer & Screw Fasteners for Industry

SEMS Screw Operational Procedures
Preparation and Check
Check SEMS unit: Make sure that you are using the proper SEMS screw for the job. Check:
Screw Type: (i.e. M4, M6, #10-32)
Screw Length: Ensure it is suitable for the thickness of the material.
Screw Drive: (i.e. Phillips, Pozidriv, Hex, Torx).
Washer Type: Check that the washer is appropriate for the job (i.e., split lock washer for vibration protection, flat washer to distribute the load over a larger surface).

FAQ

When was Yu-Huang established?

Yu-Huang is established since 1998.
Yu-Huang is focused on the R&D and the customize of non-standard hardware fasteners and for the mass production of precision fasteners.
Certifications: Yu-Huang possess ISO9001, ISO14001 and IATF16949 certifications. Honor: it has been titled a High-tech Enterprise.

Our Company

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Yuhuang Quality connects 40 countries' markets

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Small fasteners, big customization Yuhuang's strength

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Small fasteners, big customization Yuhuang's strength

Discover how Yuhuang's custom micro fasteners enhance reliability and performance in high-density, lightweight applications. Reduce failure rates & boost efficiency. Learn more.
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Yuhuang high-end fasteners win with quality

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How does Yuhuang ensure reliability in extreme environments? Discover how strict quality control and premium materials make their fasteners ideal for aerospace, 5G, and precision machinery. Learn more.
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Yuhuang leads the way in eco-friendly fasteners

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Yuhuang leads the way in eco-friendly fasteners

Discover how Yuhuang's sustainable fasteners reduce pollution & meet REACH, ROHS standards. Ideal for EVs & green manufacturing. Learn more.
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What Our Clients Are Saying

Mike R.
Mike R.

"As an auto mechanic, time is valuable-I was wasting minutes every day searching for the right type of washer to go with screws. I shifted to SEMS screws (for valve covers, transmission pans, brackets, etc.) that expedited my workflow: you could always trust the washer was the correct size and would freely spin along the screw making placement easy. I have never used screws with a washer and found them consistent in quality. I did not have to deal with over-torquing or service issues with the washers deforming-they are definitely worth it for a professional."

Sarah P.
Sarah P.

"I have restored a 1969 Mustang and by the virtue of authenticity I knew the original fasteners were SEMS screws. I was glad to find a supplier that had the correct sizes and finishes. The pre-assembled washer provided an OEM-quality fit and finish (way better than screwing on a washer separately). They looked great and worked great-I would highly recommend the the screws for an application where details and consistency matter when restoring a car."

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Why Choose Us

Why Choose Us

Established in 1998, Yu-Huang is a comprehensive industrial-trade company that engages in manufacturing, research and development, sales, and service. Focused on the research and development/customization of non-standard hardware fasteners, it also manufactures precision fasteners to GB/ANSI/DIN/JIS/ISO standards across screw/nut/washer/stamped products.
With a 20,000 square meter footprint, Yu-Huang has dedicated teams and mature supply chains that guarantee efficiency and stability in output. Quality assurance is in place via internal quality checks and certifications , and Yu-Huang boast a "High-tech Enterprise" title.
Yu-Huang products are exported to more than 40 countries and applied to 5G/aerospace/electronics/auto parts and some large companies like Xiaomi, Huawei, and SONY. Our dedicated pre-sales/in-sales/after-sales representative offers OEM&ODM, and 1-stop hardware assembly solutions in adherence to the "quality first, customer satisfaction" motto to create custom

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