Ideal for delicate painted products! Screws with integrated stainless steel spring washers that excel in corrosion resistance!
"TWO LOCK M's" is a screw that incorporates a TWO LOCK washer. Compared to conventional spring washers, it has a wavy shape, which provides greater spring resistance and is more resistant to loosening. Additionally, its unique shape minimizes the biting into the counterpart material during tightening, making it less prone to damage. The washer's low height also means that less tightening is required. Therefore, the screw can be shorter and lighter. We have developed and commercialized this steel TWO LOCK with its advantages intact, using rust-resistant stainless steel material. ● For other functions and details, please download the catalog.
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basic information
【Features】 ● Compared to conventional spring washers, it provides a significantly larger spring reaction force, tightening "firmly" with over five times the force. ● With a large spring reaction force, it offers strong resistance to loosening, demonstrating excellent anti-loosening effects. ● With four contact points, the spring reaction force is evenly distributed. ● The cutting edge is located in the middle of a wavy shape, making it less prone to C-shaped deformation during tightening, allowing it to be used on easily scratched painted products. ● Retaining the advantages of steel TWO LOCK, stainless steel material has been developed (equivalent to SUS304). It is highly corrosion-resistant, expanding the range of use without worrying about rust formation. ● Due to its thin plate thickness and low height, it is lightweight, requires less tightening force, and has a small incomplete thread section (dimension a), making it suitable for use on thin plates. Additionally, bolts can be made shorter, allowing for further weight reduction. ● For other functions and details, please download the catalog.
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Detailed information
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Difference between initial axis and residual axis For details, please refer to the table on the website. https://www.maruemu.co.jp/product/spack.html
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Size of the seat cushion For details, please refer to the table on the homepage. https://www.maruemu.co.jp/product/spack.html
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Company information
In 1927, our company started as a manufacturing and sales business focused on hardware products such as cotter pins, and in 1957, we began mass production as a pioneer of stainless steel screws. The frontier spirit that lives on at Maruemu Seisakusho has led to the creation of core technologies based on our history and the accumulation of skills, including "product development of new materials, material processing, and fastening technology."