Wrench & Socket Sizes For Different Diameter Bolts
Figure 1 - Open end wrench |
Figure 2 - Socket |
Knowing what size wrench
| Wrench & Socket Sizes | |
Diameter Of Bolt |
Socket or Wrench Head Size |
# 6 / # 8 |
1/4 |
# 10 / # 12 |
5/16 |
1/4 |
7/16 |
5/16 |
1/2 |
3/8 |
9/16 |
7/16 |
5/8 |
1/2 |
3/4 |
9/16 |
13/16 |
5/8 |
15/16 |
3/4 |
1-1/8 |
7/8 |
1-5/16 |
1 |
1-1/2 |
The chart is applicable 99% of the time for open end, box end, 6 and 12 point sockets.
In some cases a manufacturer may adjust the head size of a bolt in order to have the head fit into a certain location.