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Products Flat Washers,ASTM F436 Typical Material：   1045 Carbon Steel Material and Mechanical Properties：  ASTM F436 Dimensions：   ASTM F436 Marking：   Manufacturers I.D & F436 mark. Hardness：   Per ASTM F436 (HRC 38-45 for plain an plated washers, HRC 26-45 for HDG washers)   Detailed

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