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Metric spanners

Metric spanners relate to the gap between the jaws in mm and therefore
equate to the dimension across the flats of the nut.

Thread Size
Spanner Size
mm
Pitch
M = mm dia.
Std. ISO
Jap.
Std.
Fine
Jap.
4
5
6
7
8
9
10
12
14
16
18
7
8
10
11
13
14
17
19
22
24
27
-
-
-
-
12
-
14
-
-
-
-
0.70
0.80
1.00
1.00
1.25
1.25
1.50
1.75
2.00
2.00
2.00
-
-
-
-
1.00
-
1.00
1.50
1.50
1.50
1.50
-
-
-
-
1.25
-
1.25
-
-
-
-
Thread Size
Spanner Size
mm
Pitch

Tap Size
mm .
Drill Size
mm.
2.3
2.6
3.0
3.5
4.0
4.5
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
1.9
2.1
2.5
2.9
3.3
3.8
4.2
5.0
6.0
6.8
7.9
8.5
9.5
10.2
Tap Size
mm .
Drill Size
mm.