1/4 Heavy Duty Jobber Drill Bit

7 x 3 Simpson Trim-Head Wood Decking Screws - Square Drive 316 SS - 5 lbs Pack (490)

5/8-18 x 5 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (100)

2-4 1/2 x 15 Socket Cap Screw Alloy

5/8-11 x 20 A307 Grade A Timber Bolts Hot Dipped Galvanized 6in Thread (25) Jobber Drill Bits - Cobalt 1/4 Heavy Duty Jobber Drill5 8 11 x 20 A307 Grade A Timber Bolts Hot Dipped Galvanized 6in Thread (25) . All timber bolts, regardless of length will have 6 inches of thread on the shank. Timber bolts are typically used in marine and treated wood applications. Slightly different than carriage bolts, timber bolts have fins on the neck underneath the head to prevent the bolt from turning during installation. The oversize head eliminates the need for a washer.