مسامير نقل 5/16-18 × 4 بوصة | ملولبة بالكامل | فولاذ A307 درجة A مطلي بالزنك (100 / عبوة)

The square neck on these bolts really digs into the wood and keeps them from spinning while I tighten them—a huge time saver. I used them to attach some heavy beams, and the zinc plating seems like it will hold up well outdoors.

Used these to build a pergola frame and the fully threaded length let me sink them deep into the beam without any slippage. The zinc coating hasn't shown a speck of rust after a few weeks of rain.

The square neck grabbed the wood perfectly on my pergola frame, no spinning at all. Finish is smooth and uniform across all 100 bolts, and they threaded cleanly into my pre-tapped holes.