BS 7046-1:1994 : Countersunk flat head screws (common head style) with type H or type Z cross recess — Product grade A — Part 1: Steel of property class 4.8
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This part of ISO 746 specifies the characteristics of countersunk flat head screws with threads from M1,6 to M10 inclusive, of product grade A and property class 4.8, and with type H or type Z cross recess.
BS 7046-1:1994 : Countersunk flat head screws (common head style) with type H or type Z cross recess — Product grade A — Part 1: Steel of property class 4.8