DIN7978 internal threaded pin Taper

DIN 7978 

*All measurements in millimeters (mm)* 

d a approx r approx d1 d2 t1 t2 max t3
6 0.8 6 M4 4.3 6 10 1
8 1 8 M5 5.3 8 12 1.2
10 1.2 10 M6 6.4 10 16 1.2
12 1.6 12 M8 8.4 12 20 1.2
16 2 16 M10 10.5 16 25 1.5
20 2.5 20 M12 13 18 27 1.5

 All information is strictly informative