Screws diameter

 

The fastest way to determine the screw diameter is to use a caliper gauge as shown in the picture on the left. For this purpose, the caliper gauge is placed parallel to the screw. In the example on the left, the screw diameter of an M8 screw is measured.

 

In the table below you will find all common screw diameters from M1 to M64 and the through hole sizes. A through hole is a hole through a workpiece through which a screw is passed. A distinction is made here between "fine", "medium" and "coarse". If possible, "coarse" should be selected, as this compensates for any manufacturing errors and makes assembly easier.

Screws diameter table

Screw Size

Screw diameter

Through hole

fine

(mm)

medium

(mm)

coarse

(mm)

Screw diameter M1 1,0 mm  1,1 1,2 1,3
Screw diameter M1,2 1,2 mm 1,3 1,4 1,5
Screw diameter M1,4 1,4 mm 1,5 1,6 1,8
Screw diameter M1,6 1,6 mm 1,7 1,8 2
Screw diameter M1,8 1,8 mm 2 2,1 2,2
Screw diameter M2 2,0 mm 2,2 2,4 2,6
Screw diameter M2,5 2,5 mm 2,7 2,9 3,1
Screw diameter M3 3,0 mm 3,2 3,4 3,6
Screw diameter M3,5 3,5 mm 3,7 3,9 4,2
Screw diameter M4 4,0 mm 4,3 4,5 4,8
Screw diameter M5 5,0 mm 5,3 5,5 5,8
Screw diameter M6 6,0 mm 6,4 6,6 7
Screw diameter M7 7,0 mm 7,4 7,6 7,8
Screw diameter M8 8,0 mm 8,4 9 10
Screw diameter M10 10 mm 10,5 11 12
Screw diameter M12 12 mm 13 13,5 14,5
Screw diameter M14 14 mm 15 15,5 16,5
Screw diameter M16 16 mm 17 17,5 18,5
Screw diameter M18 18 mm 19 20 21
Screw diameter M20 20 mm 21 22 24
Screw diameter M22 22 mm 23 24 26
Screw diameter M24 24 mm 25 26 28
Screw diameter M27 27 mm 28 30 32
Screw diameter M30 30 mm 31 33 35
Screw diameter M36 36 mm 37 39 42
Screw diameter M42 42 mm 43 45 48
Screw diameter M48 48 mm 50 52 56
Screw diameter M56 56 mm 58 62 66
Screw diameter M64 64 mm 66 70 74

* All data without guarantee.