5/16-18 X 8-1/2" Carriage Bolts | A307 Grade A Zinc Plated Steel (200 / Pkg.) Steel Black Phosphate & Oil Applications: Finishing drilled holes in

Applications: Finishing drilled holes in ferrous and nonferrous metals

fan housings

fabricated from HSS

Head style: Phillips pan head with a wide bearing surface for flush seating

Drive type: Phillips for consistent seating and torque transfer

5/16-18 X 8-1/2" Carriage Bolts | A307 Grade A Zinc Plated Steel (200 / Pkg.) Steel Black Phosphate & Oil Applications: Finishing drilled holes in5 16 18 X 8 1 2" Carriage Bolts in A307 Grade A Zinc Plated Steel. Carriage bolts feature a smooth, rounded head with a square neck underneath that pulls into the material to prevent the bolt from turning during installation, making them ideal for wood to wood and wood to metal connections. Domed head with square anti rotation neck A307 Grade A Zinc Plated Steel construction Coarse thread for use in wood and with nuts and washers Sold in bulk packs