5/16-18 X 6-1/2" مسامير عربة | فولاذ A307 درجة A مطلي بالزنك (50 / عبوة)

The square neck on these grabs the wood instantly and doesn't spin when I tighten the nut. I just finished setting up a pergola and all 50 bolts seated flush without any stripping.

These bolts were exactly what I needed for a heavy-duty timber bench I’m building. The zinc coating looks clean and even, and the rounded head sits flush without snagging. They drove in nice and straight with no bending.

The square neck grabbed the wood instantly when I tightened them, no spinning or gouging the surface like regular bolts do. Zinc plating is smooth and consistent across all fifty pieces, and every thread was clean right out of the package.