They are available in high strength

1 1/2-8 A194 2H Heavy Hex Nut Zinc

5/16-18 x 4 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (300)

195 x 4 Simpson Strong-Drive® SDWH Timber-Hex Screw Double-Barrier Coated - Box (50)

1-8 x 4 1/2 Socket Cap Screw 18-8 (A2) Stainless Steel

7/8-9 x 4 3/4 A325 Type 1 Heavy Hex Bolt Hot Dipped Galvanized Domestic USA - Bulk Keg (130) Star Flat Decking Screws Yellow Zinc Plated They are available in highThis 130 piece keg of A325 Type 1 Heavy Hex Bolts is domestically made in the USA. Each bolt is 7 8 9 x 4 3 4 inches and features a hot dipped galvanization finish. Perfect for heavy duty construction projects.