Amazon.co.jp: Iron (SCM435)/Unichrome Hex Bolts, Strength Classification: 10.9 [Made of Japanese Studded Screw] (Half Screw) M6 x 25 (Pack of 10) : Industrial & Scientific
Amazon.com: (10 pcs) M20-2.5 X 110mm, DIN 931 / ISO 4014, Metric, Hex Head Cap Screws Bolts, Part Thread, Class 10.9 Steel, Plain : Industrial & Scientific