5/16-18 X 6" مسامير عربة | ملولبة بالكامل | فولاذ مطلي بالزنك A307 درجة A (100/عبوة)

The square neck under the head really does its job—once I tightened these into the wood, they held firm without a single spin. The zinc plating looks clean and uniform across all 100 pieces, and they drove in smoothly with no stripped threads.

I needed these for a deck repair and the full threading made it easy to get a tight hold in the wood. The zinc coating looks clean and I didn’t have any issues with them spinning during installation.

The square neck under the head grabbed instantly into the wood, no spinning or slipping like with standard hex bolts. A full hundred pieces in the package, more than enough for my deck project.