For industrial machinery! Screws that won't loosen even with vibrations and impacts from the machinery.

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last updated：Jul 30, 2026

アートスクリュー

Solve the common problem of bolt and screw loosening at specific points in construction machinery! Anti-loosening bolt "Motion Tight".

Are you troubled by "loose bolts and screws"? Motion Tight is a "loose prevention bolt" that solves the problem of loose bolts and screws. In machine tools, issues with loosening bolts and screws can occur due to vibrations and shocks from the machinery. However, it provides strong anti-loosening power simply by tightening it like a regular screw, without the need for special installation or work. It is also possible to use it only in specific areas to keep costs down. 【Do you have any of these concerns?】 ■ I want bolts that won’t loosen when incorporated in places with a lot of vibration and shaking... ■ I want to use it in small lots for specific areas... ■ I can prevent loosening on the nut side, but the female thread side has a tapped hole... ⇒ All your problems are solved with the anti-loosening bolt "Motion Tight"! We also offer online sales, so we can accommodate small lots. Please feel free to contact us.

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basic information

【Patent Numbers】 ■Patent No. 4806103 ■Patent No. 4878407 【Evaluation Tests】 ■NAS Vibration Test →Passed a total of 30,000 rotations of vibration testing in 17 minutes. ■Yunker Vibration Test →Comparison data with standard products available on the official website. ■Fatigue Test: JISB1081 →Approximately 20% improvement. ■Load Distribution Ratio (%) 　　　　　　　Standard Bolt: Motion Tight →Thread No. 1　　　　32.9：　　　　　26.4 →Thread No. 2　　　　19.7：　　　　　19.6 →Thread No. 3　　　　14.1：　　　　　15.6 →Thread No. 4　　　　11.5：　　　　　13.4 →Thread No. 5　　　　10.4：　　　　　12.2 →Thread No. 6　　　　11.4：　　　　　12.8 →　Total　　　　　 100.0：　　　　　100.0 *Motion Tight has a more averaged load distribution ratio compared to standard products, resulting in higher fatigue strength and reduced likelihood of breakage. ■Torque and Axial Force Test 　→Variation in axial force is about half that of standard products. *For more details, please refer to the catalog. Feel free to contact us with any inquiries.