Solving the loosening problem of small-diameter screws under 3mm: 'Loosening Prevention Screws and Bolts'

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last updated：Jul 15, 2026

アートスクリュー

Are you troubled by the loosening of small screws and small diameter screws? We improve the problem of "loosening" without using adhesives.

Motion Tight is a "looseness prevention bolt" that solves the problem of loosening bolts and screws. Its workability is the same as that of regular screws, allowing for smooth insertion and demonstrating a stable axial force that effectively prevents loosening. While it is a highly versatile small-diameter screw, using adhesives becomes difficult for sizes below 3mm, making the loosening issue a chronic challenge. ⇒ However... with Motion Tight? It can accommodate sizes of '2mm, 2.5mm, and 2.6mm', making it effective for preventing loosening in small-diameter screws! 【Product Features】 ■ Strong loosening prevention power with the bolt alone ■ Fatigue strength 1.2 times greater ■ Workability is the same as regular screws, allowing for smooth insertion ■ Stable axial force even without lubrication ■ Does not seize even with stainless screws ■ Prevents loosening without using adhesives (no contamination occurs) *For product details, please view the materials from [PDF Download] or 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 vibration test with a total of 30,000 rotations 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.

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Applications/Examples of results

Aerospace industry, automotive, semiconductor industry, industrial machinery, medical devices, etc. *For more details, please contact us or download the catalog.*