クラウンファスナー List of Products and Services

We would like to introduce a case study of processing improvement proposed by Crown Fastener Co., Ltd. We proposed to improve the entire cutting process, which was facing issues such as "production quantities not increasing" and "surface accuracy inside the holes not being achieved, requiring additional processing," by switching to forging processing (header processing). As a result, significant mass production became possible, and the accuracy stabilized due to production with molds. Additionally, it led to increased strength due to work hardening and substantial cost reductions. 【Case Study】 ■Before - Production quantities were not increasing - Surface accuracy inside the holes was not achieved, requiring additional processing ■After - Significant mass production became possible - Accuracy stabilized due to production with molds - Strength increased due to work hardening - Substantial cost reductions achieved *For more details, please refer to the PDF document or feel free to contact us.

• nut
• bolt
• Other machine elements

Our company manufactures and sells micro fasteners (ultra-small cold-forged parts), various cold-forged parts, various small screws, tapping screws, shafts, hex bolts, various cutting products, pressed products, and springs. Our equipment accommodates sizes from 1mm to 12mm. We utilize measurement and inspection equipment such as tool microscopes and projectors to establish a quality control and assurance system, aiming for zero defective products. Additionally, we have introduced fluorescent X-ray analyzers and spectrophotometers to meticulously check for harmful substances such as hexavalent chromium, mercury, and cadmium in screws. We are actively addressing environmental issues. 【Business Divisions】 ■ Manufacturing Division ■ Technology Development Division ■ Quality Control Division ■ Sales Division *For more details, please download the PDF or feel free to contact us.

• nut
• bolt
• Other machine elements