SEMS screws (washer-combined screws) are fasteners integrating screws and washers into one piece, eliminating the need for separate washer assembly, which greatly improves installation efficiency and connection stability. As a professional source factory specializing in SEMS screws production, we offer diversified products with various materials, specifications and surface treatments, covering the needs of industrial equipment, electronic terminals, mechanical spare parts and other scenarios.

Diversified Product Series

Our SEMS screw series includes 24 core products, focusing on three mainstream materials and various structural designs to meet different working conditions:

• Stainless Steel Series: A2-70/SUS304 material, rust-proof and corrosion-resistant, including cross recessed pan head SEMS screws with multi-washers, socket head SEMS screws with two washers, external hex washer head half machine thread long screws, etc., suitable for humid or high-precision scenarios;
• Brass Series: Excellent electrical conductivity, including slotted recessed brass SEMS screws with square washers, nickel-plated brass pan head screws for terminal blocks, Phillips pan head brass terminating screws with square washers, suitable for electronic terminals and conductive scenarios;
• Carbon Steel Series: High strength and durability, covering zinc-plated pan head combination screws, locking wire combination washer screws, nickel-plated disc spring washer screws, which are the first choice for general machinery such as diesel engines and office chairs.

Core Product Advantages

1. One-piece Molding Design: Screws and washers are firmly combined to avoid washer falling off during installation, improving assembly efficiency;
2. Multi-material Adaptation: Stainless steel, brass and carbon steel are available on demand to meet different needs such as rust prevention, electrical conductivity and high strength;
3. Standard Compliance: Strictly follow international standards such as DIN912 and DIN9021, with high dimensional accuracy and strong interchangeability;
4. Rich Surface Treatments: Zinc plating, nickel plating, copper plating and other processes to enhance corrosion resistance and adapt to complex environments;
5. Flexible Customization: Support M2-M12 specifications, special washers (rubber, plastic, rectangle, square) and OEM/ODM customization to meet personalized needs.

Widely Application Scenarios

With stable performance, our SEMS screws have been widely used in:

• Electronic & Electrical: Terminal blocks, barrier strips, switch boxes, terminal boxes (special for terminal lock screws with ribbed clamp);
• Mechanical Equipment: Diesel engine spare parts, fuel injection pumps, sprayer accessories, office chairs (big head washer head steel screws);
• General Industry: Various equipment fixing and protective assembly, adapting to the connection needs of multiple substrates.

Source Factory Guarantee

As a professional SEMS screw factory in China, we have mature cold heading and electroplating production processes. All products undergo strict quality inspection to ensure batch stability. We support small-batch customization and large-batch supply, provide technical consultation and rapid prototyping services, and offer cost-effective washer-combined SEMS screw solutions for global customers.

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Dongguan Ganggu Hardware Product Co.,Ltd

Finefix Hardware (Vietnam) Limited

Mob/Whatsapp/Wechat:  +86(0)18602085825

china:  angel@ganggus.com       Web: www.gangguscrew.com   www.ggscrew.com

 Vietnam:eric@ganggus.com       https://finefix.vn       https://finefixvn.trustpass.alibaba.com

China Add: NO.101 Jianjia industrial park,NO.2 Jintang Road,Changping 

                    Town, Dongguan City, Guangdong CN.   Zip code:523579

Vietnam Add: plot C_6a_CN,My Phuoc 3 INDUSTRIAL PARK,Thoi hoa Ward,

                           Ben Cat Town,Binh Duong Province ,Viet Nam