276 x 4 Simpson Strong-Drive® SDWH TIMBER-HEX Hot Dipped Galvanized 3/8 in

and a unique head that countersinks cleanly

1/2-20 x 1 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (300)

Hardness for plain and zinc plated washers is HRC 38-45 and HRC 26-45 for hot-dip galvanized washers per ASTM F436

Comes in a bulk keg of 60 bolts

1 1/8-7 x 7 1/2 A325 Type 1 Heavy Hex Bolt Hot Dipped Galvanized Domestic USA - Bulk Keg (30) Simpson Rod Coupling/Tie Wire/Duplex Crimp Drive Anchor Zinc Plated 276 x 4 Simpson Strong-Drive®This bolt bundle includes 30 1 1 8 7 x 7 1 2 A325 Type 1 Heavy Hex Bolts hot dipped in domestic USA galvanized for maximum strength and longevity. Perfect for industrial applications.