Countersunk flat head screws (common head style) with type H or Type Z Cross Recess - Product Grade A part 2 Steel Screws of Property Class 8.8, Stainless Steel Screws and Non - Ferrous Metal Screws ( Third Revision)
Countersunk Flat Head Screws (Common head Style) With Type H or Type Z Cross Recess - Product Grade A Part 1 Steel Screws of Property Class 4.8 ( Third Revision)