Name：Flat Washers,ASTM F436

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)