Bolt Head Uses Wrench Size (mm)

Written by Matt Milbury on . Posted in Thread Datasheets

Bolt Head Uses Wrench Size (mm) Datasheet

Bolt

Diameter

Wrench Size
ANSI/ISODINJISDIN/ISP

Heavy Hex

4 7 7 7 -
5 8 8 8 -
6 10 10 10 -
7 - 11 - -
8 13 13 12 -
10 16 17 14 -
12 18 19 17 22/21*
14 21 22 19 -
16 24 24 22 27
18 - 27 - -
20 30 30 -

34/32*

* Denotes ISO Standard