Amazon | Steel Flat Washer, Zinc Plated Finish, DIN 125, Metric, M8 Screw Size, 8.4 mm ID, 16 mm OD, 1.6 mm Thick (Pack of 100) by Small Parts | 平座金 | 産業・研究開発用品 通販
Amazon | Brass Flat Washer, Plain Finish, DIN 125, Metric, M3 Screw Size, 3.2 mm ID, 7 mm OD, 0.5 mm Thick (Pack of 100) by Small Parts | 平座金 | 産業・研究開発用品 通販