Page 1054 - Tungaloy Catalog

Technical Reference
Bolt Hole Diameters
Guideline for bolt hole diameters

A bolt hole diameter is determined as a thread diameter plus some clearance.

Bolt hole diameter Counterboring diameter Chamfer width

Threaded part, M6
Nominal thread size: 6

d Bolt hole diameter (Unit: mm)
Bolt hole diameter Counterboring
Nominal thread size Chamfer width
Class 1 Class 2 Class 3 diameter
1 1.1 1.2 1.3 0.2 3
1.2 1.3 1.4 1.5 0.2 4
1.4 1.5 1.6 1.8 0.2 4
1.6 1.7 1.8 2 0.2 5
1.7 1.8 2 2.1 0.2 5
1.8 2 2.1 2.2 0.2 5
2 2.2 2.4 2.6 0.3 7
2.2 2.4 2.6 2.8 0.3 8
2.3 2.5 2.7 2.9 0.3 8
2.5 2.7 2.9 3.1 0.3 8
2.6 2.8 3 3.2 0.3 8
3 3.2 3.4 3.6 0.3 9
3.5 3.7 3.9 4.2 0.3 10
4 4.3 4.5 4.8 0.4 11
Technical Reference 5 5.3 5.5 5.8 0.4 13
4.5
13
4.8
5.3
5
0.4
15
6.6
0.4
7
6.4
6
7.6
0.4
8
18
7
7.4
10
9
8.4
8
0.4
20
12
10
11
28
13
12 10.5 13.5 14.5 0.4 24
1.1
14 15 15.5 16.5 1.1 32
14 16 17 17.5 18.5 1.1 35
18 19 20 21 1.1 39
20 21 22 24 1.2 43
22 23 24 26 1.2 46
24 25 26 28 1.2 50
27 28 30 32 1.2 55
14–36