Bolt Head Uses Wrench Size (in)

Written by Matt Milbury. Posted in Thread Datasheets

Bolt Head Uses Wrench Size (in) Datasheet

Bolt

Size

Wrench Size
Hex Bolt,

Lag Bolt,andSquare Bolt

Heavy

Hex Bolt

#0 - -
#1 - -
#2 - -
#3 - -
#4 - -
#6 1/4 -
#8 1/4 -
#10 5/16 -
#12 5/16 -
1/4 7/16 or 3/8 -
5/16 1/2 -
3/8 9/16 -
7/16 5/8 -
1/2 3/4 7/8
9/16 13/16 -
5/8 15/16 1 1/16
3/4 1 1/8 1 1/4
7/8 1 5/16 1 7/16
1 1 1/2 1 5/8
1 1/8 1 11/16 1 3/4
1 1/4 1 7/8 2
1 3/8 2 1/16 2 9/16
1 1/2 2 1/4 2 3/4
1 3/4 2 5/8 2 15/16
2 3 3 1/8
2 1/4 3 3/8 3 1/2
2 1/2 3 3/4 3 7/8
2 3/4 4 1/8 4 1/4
3 4 1/2 4 5/8
3 1/4 4 7/8 5
3 1/2 5 1/4 5 3/8
3 3/4 5 5/8 5 3/4
4 6 6 1/8