mm

1020

3040

5060

7080

9010

011

012

013

014

015

016

017

018

019

020

021

022

023

0in

12

34

56

78

9

Copyright © 2000-2017 Bolt Depot Inc.

IMPORTANT: Make sure to print this chart to Actual Size (no scaling).After printing, measure the ruler in the margin to ensure correct scale.

US Hex Bolt Sizes and Thread Pitcheswww.boltdepot.com/tools

See boltdepot.com/tools for more details.www.boltdepot.com/tools

Length

1/4” - 20

#10 - 24

#8 - 32

#6 - 32

5/16” - 18

3/8” - 16

7/16” - 14

1/2” - 13

9/16” - 12

1/4” - 28

#10 - 32

5/16” - 24

3/8” - 24

7/16” - 20

1/2” - 20

9/16” - 18

Length is measured from under the headto the end of the bolt

#4 - 40

9/16”

1/2”

7/16”

3/8”

5/16”

1/4”

#10

#8

#6

#4

Coarse thread

Fine thread

Coarse thread

Fine thread

Coarse thread

Fine thread

Coarse thread

Fine thread

Coarse thread

Fine thread

Coarse thread

Fine thread

Coarse thread

Coarse thread

Coarse thread

Coarse thread

Fine thread

US Hex Bolt Sizes and Thread Pitches (continued)

mm

1020

3040

5060

7080

9010

011

012

013

014

015

016

017

018

019

020

021

022

023

0in

12

34

56

78

9

Copyright © 2000-2017 Bolt Depot Inc.

IMPORTANT: Make sure to print this chart to Actual Size (no scaling).After printing, measure the ruler in the margin to ensure correct scale.

www.boltdepot.com/tools

See boltdepot.com/tools for more details.www.boltdepot.com/tools

3/4” - 10

7/8” - 9

1” - 8

5/8” - 11

3/4” - 16

7/8” - 14

1” - 14

5/8” - 18

1”

7/8”

3/4”

5/8”

Coarse thread

Fine thread

Coarse thread

Fine thread

Coarse thread

Fine thread

Coarse thread

Fine thread