Stainless steel materials called out in the above Table 4 shall be a property class A2 stainless steel. The properties for A2stainless steel can be found in ISO 3506-1, “Mechanical Properties of Corrosion Resistant Stainless-steel Fasteners -Part 1:Bolts, Screws and Studs.”For reference, A2 stainless steel material with a Rockwell hardness (C) more than 35-43 HRC or an equivalent hardness value