مسامير عربة 1/2-13 × 3" | ملولبة بالكامل | فولاذ عادي A307 Grade A (50/عبوة)

The square neck under the head really does bite into the wood and keep the bolt from spinning while I tighten the nut. This 50-pack was perfect for building a heavy-duty workbench frame and each bolt threaded cleanly without binding.

I needed a full 50-pack for a wooden gate repair and these carriage bolts had the square neck that locks in tight, so no spinning while tightening. The A307 steel feels solid enough for outdoor work and the threads are clean all the way down.

Put these on my trailer deck rebuild and the square neck grabbed just like it should, no spinning at all. The zinc coating is holding up fine so far after a few rainstorms.