Stainless Steel 303 Spacer Hexagon Long Screw Spring + Flat Washer Included / WSU-A (Long Screw)
This product is a spacer made of stainless steel SUS303, which has excellent machinability. It is provided with spring washers and flat washers pre-assembled, significantly improving work efficiency during installation. The product features a long male thread design, ensuring a secure fit when stacking multiple circuit boards or plates. With the longer screw section, it maintains sufficient effective screw length even when connecting thick materials or fixing multiple parts simultaneously, providing stable holding power. Since there is no need to prepare and install washers individually, it not only reduces assembly labor but also prevents human errors such as forgetting to attach parts. Additionally, the high rigidity and strength of SUS303 material provide stable holding power even under pressure from the washers, supporting long-term reliability.
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basic information
■Specifications ・Material: Free-cutting stainless steel (SUS303) ・Treatment: Degreased ■Spring Washer ・Material: Stainless steel; Treatment: Unfinished ■Set Washer ・Material: Stainless steel; Treatment: Unfinished ■EU-RoHS2 ・RoHS2 compliant ■Standards ・Screw diameter: M3/M4
Price information
For more details, please check our website or catalog, or feel free to contact us.
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Applications/Examples of results
We offer a variety of products that can be used for various applications, including printed circuit board assembly, electronic component assembly, semiconductor assembly, relay terminal assembly, distribution board components, robot parts, industrial machinery, machine tool parts, water treatment machinery parts, FA equipment, mobile communication, mobile mobility, and base station-related components.
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We, Hirosugi Instruments, are a comprehensive manufacturer of mechanical and electronics parts, dealing with spacers, terminals, washers, bushes, screws, and more. Our wide range of products boasts a diverse lineup that matches various applications, and we have received high praise from customers in various industries for providing multifunctional, high-quality products with short delivery times and low costs. From product development to design, procurement, and technical support, we provide one-stop support through our product offerings. ■ Company Features ■ 1: Offering a diverse selection of over 118,000 standard parts. 2: One of the largest spacer lineups in Japan. 3: Free shipping for orders over 3,000 yen (excluding tax). 4: Orders can be placed starting from a minimum lot of 50 pieces. 5: High-quality standard products at ISO levels. 6: Fast delivery from our own stock for all products. 7: Affordable pricing with cost control. 8: Support for issuing various certificates. 9: Actively supporting the production of custom products. 10: Providing consistent and specialized services.





