DIN 7978

Taper pins with internal thread

Type A = Polished

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Nominal Diameter Φ6 Φ8 Φ10
d max=nominal size (h10) 6 8 10
min 5.952 7.942 9.942
a ≈ 0.8 1 1.2
d2 M4 M5 M6
d1 4.3 5.3 6.4
t1 6 8 10
t2 min 10 12 16
t 1 1.2 1.2

Nominal Diameter Φ12 Φ14 Φ16
d max=nominal size (h10) 12 14 16
min 11.93 13.93 15.93
a ≈ 1.6 1.6 2
d2 M8 M8 M10
d1 8.4 8.4 10.5
t1 12 12 16
t2 min 20 20 25
t 1.2 1.2 1.5

Nominal Diameter Φ20 Φ25 Φ30
d max=nominal size (h10) 20 25 30
min 19.916 24.916 29.916
a ≈ 2.5 3 4
d2 M12 M16 M20
d1 13 17 21
t1 18 24 30
t2 min 27 34 42
t 1.5 2 2

Nominal Diameter Φ40 Φ50
d max=nominal size (h10) 40 50
min 39.9 49.9
a ≈ 5 6.3
d2 M20 M24
d1 21 25
t1 30 36
t2 min 42 50
t 2 2.5



d = nominal size


All information is strictly informative