Amazon.com: (3500pcs) ISO 7380 M3X8/8 Button Head Screws with 6-Lobe Drive, Fullthread A2 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP738012T3-8 : Industrial & Scientific
Amazon.co.jp: M3x8 Aluminum Flange Button Head Screw (Red/4pcs) B01308F-AR : Toys & Games
Amazon.co.jp: Tool mania 低頭キャップスクリュー(全) ステンレス SUS M3X8 50本 : 産業・研究開発用品
Amazon.co.jp: Maruim Super Ferrite 160 Small Screw Plate M3x8 2000 Count : Industrial & Scientific