ST9.5x32 Self tapping screws DIN7981 pan head ISO7049 type C -H zinc plate
This International Standard specifies the characteristics of Cross recessed pan head tapping screws with thread sizes from ST 2,2 to ST 9,5 inclusive.
The minimum surface hardness after heat treatment
shall be 450 HV 0,3
The core hardness af?er heat treatment shall be
270 HV 5 to 390 HV 5 for threads S ST3,9, and
270 HV 10 to 390 HV 10 for threads > ST4,2.
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Self tapping screws dimensions