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This pack of 750 Knurled Locking Safety Washers, made by Beneri S.p.A. in Italy, is a must-have for any professional tradesperson or DIY enthusiast. These carbon steel washers have a white zinc plated finish and a hardness rating of HRC 44-50, making them ideal for use in a wide range of applications. Measuring 15 mm inside diameter and 22 mm outside diameter, these washers are designed to fit 14 mm bolts with a grade of 8.8. They are metric in size and have a thickness of 1.10 mm. These washers are perfect for those who require a reliable locking mechanism without worrying about the condition of the item.