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[I-275] Tightening tests of non-projected and sandglass-shaped bolt with high strength and durability

*Masashi Takayama¹, Hitoshi Moriyama², Tatsuya Hashimoto³, Takashi Yamaguti⁴, Gen Hayashi⁴, Masayori Yoshimi⁵ (1. Tokushima University , 2. Tokushima University, 3. Osaka City University, 4. Osaka Metropolitan University, 5. NIPPON STEEL BOLTEN)

Keywords:corrosion, mechanical fastener, tightening test, high-strength bolt set