DIN 7979D

Parallel pins with internal thread

Type D = Hardened

tech-din7979D






Nominal Diameter
d		 Φ6 Φ8 Φ10
d Nominal Size (m6) 6 8 10
max 6.012 8.015 10.015
min 6.004 8.006 10.006
a1 ≈ 1.2 1.6 2
a2 ≈ 0.8 1 1.2
c1 ≈ 0.6 0.8 1
c2 ≈ 2.1 2.6 3
d2 M4 M5 M6
d3 4.3 5.3 6.4
t1 6 8 10
t2 min 10 12 16

Nominal Diameter
d		 Φ12 Φ14 Φ16
d Nominal Size (m6) 12 14 16
max 12.018 14.018 16.018
min 12.007 14.007 16.007
a1 ≈ 2.5 2.5 3
a2 ≈ 1.6 1.8 2
c1 ≈ 1.2 1.4 1.6
c2 ≈ 3.8 4 4.7
d2 M6 M8 M8
d3 6.4 8.4 8.4
t1 10 12 12
t2 min 16 20 20

Nominal Diameter
d		 Φ20 Φ25 Φ30
d Nominal Size (m6) 20 25 30
max 20.021 25.021 30.021
min 20.008 25.008 30.008
a1 ≈ 3.5 4 5
a2 ≈ 2.5 3 4
c1 ≈ 2 2.5 3
c2 ≈ 6 6 7
d2 M10 M16 M20
d3 10.5 17 21
t1 16 24 30
t2 min 25 34 42

Nominal Diameter
d		 Φ40 Φ50 Φ60
d Nominal Size (m6) 40 50 60
max 40.025 50.025 60.03
min 40.009 50.009 60.011
a1 ≈ 6.3 8 10
a2 ≈ 5 6.3 8
c1 ≈ 4 5 6
c2 ≈ 8 10 12
d2 M20 M24 M30
d3 21 25 31
t1 30 36 40
t2 min 42 50 56

Nominal Diameter
d		 Φ70 Φ80
d Nominal Size (m6) 70 80
max 70.03 80.03
min 70.011 80.011
a1 ≈ 12 14
a2 ≈ 10 12
c1 ≈ 7 8
c2 ≈ 14 16
d2 M36 M42
d3 37 43
t1 54 63
t2 min 71 82



d = nominal size
tolerance m6
*not standardized, reference values


All information is strictly informative