Introduction to the production process! Until the screw is made.
We will introduce the manufacturing process of screws at Sakae Seibyoujo. 1. Cold Forging The material, wound in coils, is cut to the length of the screw. A mold called a punch is pressed to form the head of the screw, and the shaft of the screw is shaped by pressing it into a mold called a die, resulting in the screw blank. ↓ 2. Integrated Rolling A washer is fitted onto the screw blank, and the shaft of the screw is pinched and rubbed together using a mold called a flat die to shape the screw threads, resulting in a screw with an integrated washer. ↓ 3. Surface Treatment Surface treatment is applied to prevent rust on the screws. This improves corrosion resistance and enhances the appearance. ↓ 4. Sorting The finished products are checked for missing washers or contamination with different items, and defective products are removed. ↓ 5. Packaging After inspecting dimensions, screw accuracy, and cross-fitting, the products are packed into boxes. For more details, please contact us.
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basic information
【Products Offered】 ○Types →Washer-integrated screws (flat washers, spring washers, spack washers, toothed washers) →Upset, hex trimmers, pan, flat, truss, bind →Rivets, welding bolts, tapping, etc. ○Sizes →Nominal: M2 to M16 →Length: up to 300L ○Materials: Steel (strength grades 4.8 to 10.9), stainless steel, brass, etc. ○Surface Treatment →Chromate (hexavalent, trivalent, black), zinc plating, nickel →Hot-dip, Geomet, Zinro, etc. Non-chrome options available ●For more details, please contact us.
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Company information
Our company manufactures and sells screws with integrated washers. The materials include iron, stainless steel, and brass, with sizes ranging from nominal diameter M2 to M16 and lengths up to 300L. We also handle various surface treatments, including non-chrome options. In addition to integrated screws, we accept orders for various rivets produced through cold forging, as well as rolling processing for supplied parts, and thanks to this, we produce 3 million screws daily. We have recently increased our equipment and relocated our manufacturing department to a new factory to further enhance our production capacity. Since our establishment in 1968, we have been recognized by our customers for our quick response to jobs of all sizes, making us a flexible company, and we have recently received an award for our quality as well. Please feel free to contact us.