ISO7049 DIN7981 pan head Self tapping screws
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.
Example for the designation of a Cross recessed pan head tapping screw with thread size ST 3,3, nominal length l = 13 mm, cone end type C and recess type Z:
Self Tapping screw ISO 7049 - ST 3,3 x 13 - C - Z
Self tapping screws