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DIN 7380 Specifications
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DIN 7380 Specifications
Button Head
Socket (ISO 7380)
All measurements in millimeters (mm)
Nominal Screw Diameter and Thread Pitch
A
H
S
J
T
Head Diameter
Head Height
Head Side Height
Hexagon Socket Size
Key Engagement
Min.
Max.
Min.
Max.
Ref.
Nom.
Min.
M3 x 0.5
5.40
5.70
1.43
1.65
0.38
2.0
1.04
M4 x 0.7
7.24
7.60
1.95
2.20
0.38
2.5
1.30
M5 x 0.8
9.14
9.50
2.50
2.75
0.50
3.0
1.56
M6 x 1
10.07
10.50
3.00
3.30
0.80
4.0
2.08
M8 x 1.25
13.57
14.00
4.05
4.40
0.80
5.0
2.60
M10 x 1.5
17.07
17.50
5.20
5.50
0.80
6.0
3.12
M12 x 1.75
20.48
21.00
6.24
660
0.80
8.0
4.16
M16 x 2
27.48
28.00
8.44
8.80
1.5
10.0
5.20
Nominal Screw Diameter and Thread Pitch
G
B
E
F
L
Wall Thickness
Under Head Fillet
Maximum Standard Length
Transition Diameter
Transition Length
Juncture Radius
Min.
Min.
Max.
Max.
Min.
Nom
M3 x 0.5
0.20
3.2
3.6
0.51
0.10
12
M4 x 0.7
0.30
4.4
4.7
0.60
0.20
20
M5 x 0.8
0.38
5.4
5.7
0.60
0.20
30
M6 x 1
0.74
6.5
6.8
0.68
0.25
30
M8 x 1.25
1.05
8.8
9.2
1.02
0.40
40
M10 x 1.5
1.45
10.8
11.2
1.02
0.40
40
M12 x 1.75
1.63
13.2
14.2
1.87
0.60
60
M16 x 2
2.25
17.2
18.2
1.87
0.60
60
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