5/16-18 X 4-1/2" 車螺絲 | 全螺紋 | A307 A級 無 plating 鋼 (325入)

These bolts worked perfectly for building a heavy-duty workbench, and the fully threaded shafts gave me a solid grip through multiple layers of wood. A full box of 325 means I’ve got plenty left over for future projects, which is a nice bonus.

The square neck on these carriage bolts really bites into the wood, so they don't spin when you're tightening them. They're a solid choice for anything that needs a secure, heavy-duty connection.

Fifty pounds of these showed up and the threading is clean all the way to the end, which makes a difference when you're stacking washers and nuts. The square neck seats solidly into the wood on my fence repairs, so I didn't have to hold a wrench on the head once. Solid value for the bulk price.