Timber bolts are explicitly meant for use with large wood planks and structures. They are common in lumber and marine industries.
Unit of Measure
Items
A307 GRADE A TIMBER BOLT, HDG (INCH)

5/8-11 X 6 TIMBER BOLT A307 GRADE A GALVANIZED (WITH 4" THREAD)
Web Price $464.70

A307 GRADE A TIMBER BOLT, HDG (INCH)

5/8-11 X 8 TIMBER BOLT A307 GRADE A GALVANIZED (WITH 4" THREAD)
Web Price $433.57

A307 GRADE A TIMBER BOLT, HDG (INCH)

5/8-11 X 10 TIMBER BOLT A307 GRADE A GALVANIZED (WITH 6" THREAD)
Web Price $289.38

A307 GRADE A TIMBER BOLT, HDG (INCH)

5/8-11 X 12 TIMBER BOLT A307 GRADE A GALVANIZED (WITH 6" THREAD)
Web Price $310.51

A307 GRADE A TIMBER BOLT, HDG (INCH)

5/8-11 X 14 TIMBER BOLT A307 GRADE A GALVANIZED (WITH 6" THREAD)
Web Price $294.68
Diameter N/A 5/8
Pitch N/A Coarse
Length N/A 6 N/A 8 N/A 10 N/A 12 N/A 14
Material N/A A307 Grade A
Finish N/A Galvanized
Package Quantity N/A 70 N/A 60 N/A 40 N/A 35 N/A 35