Email: info@boltdepot.comToll Free: 1-866-337-9888

US Bolt Head/Wrench Size

BoltDiameter

Head and Wrench Size

Hex Bolt-

Lag Bolt-

Square Bolt

Heavy Hex Bolt

#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

Copyright © 2000-2012 Bolt Depot, Inc.

www.boltdepot.com • info@boltdepot.com • Toll free: 1-866-337-9888