This is a new high-strength fastening solution developed through collaboration with top manufacturers boasting advanced technology in Japan.
By adopting high-strength bolt steel with excellent "delayed fracture resistance characteristics," we achieve a tensile strength of 1,400 N/mm² while maintaining an elongation of over 9%. Furthermore, the use of aerospace-grade "MJ screws" results in a shallower valley at the screw section and a larger radius at the bottom of the valley compared to standard specifications, which enhances fatigue resistance by alleviating the notch effect.
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basic information
■ Material: KNDS4 ■ Strength: Class 14.9 ■ Tensile Strength: 1,400N/mm² ■ Yield Strength: 1,260N/mm² ■ Guaranteed Load Capacity: 1,120N/mm² ■ Elongation: 9% min ■ Hardness: HRC 44～50 ■ Dimension Standard: JIS B 1176 (excluding neck radius R) ■ Screw Standard: ISO5855-1 MJ screw (for aerospace use) ■ Screw Accuracy: 4g 6g based on ISO5855-1 ■ Surface Treatment: Black oxide coating / Delta Protect
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Company information
Tobimoto Sangyo Co., Ltd. was established as a specialized trading company for screws and fastening parts in Tanimachi, Osaka City, shortly after World War II, where many shops dealing in machinery and tools lined the streets. Today, we have built over 75 years of history in the Osaka Machinery Wholesale District (commonly known as the Machinery District) located in Higashi-Osaka City, a town of small and medium-sized enterprises. Screws and fastening parts are used in various industries as the unsung heroes behind the scenes. They may not be very noticeable, but they are essential products without which assembly cannot take place. We take great joy and pride in having specialized in these screws and fastening parts for many years. Our ability to continue our business activities over the years is thanks to our customers and all the stakeholders who support us. We wish to maintain this sense of gratitude and continue to build trust with our customers in the future. With the mission of “providing the best solutions for all our customers,” we will continue to work together as a team to contribute, albeit modestly, to the development of our customers and society. We kindly ask for your continued support.