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Standard Thread Length

This technical information has been supplied by boltdepot.com

Bolt Diameter
Standard Thread Length (in.) *
Bolts 6 inches and shorter
Bolts longer than 6 inches
1/4
3/4
1
5/16
7/8
1-1/8
3/8
1
1-1/4
7/16
1-1/8
1-3/8
1/2
1-1/4
1-1/2
5/8
1-1/2
1-3/4
3/4
1-3/4
2
7/8
2
2-1/4
1
2-1/4
2-1/2
* Important note: Some bolts may vary from the standard thread length.