مسامير نقل 1/4-20 × 4-1/2 بوصة | كاملة الخيوط | فولاذ A307 درجة A مطلي بالزنك (100 / عبوة)

Used these carriage bolts to build a heavy-duty planter box for my front porch. The 4-1/2" length gave me plenty of thread engagement through 2x4s, and the zinc plating still looks clean after a few weeks of rain.

The square neck under the head locked right into the wood without any spinning, which made installing these a breeze. Finish looks clean and the threads are sharp all the way down.

The square neck under the head grabbed the wood instantly when I torqued them down, so no spinning or cursing mid-project. The zinc plating looks clean and the fully threaded length gave me plenty of bite for a 4x4 joint.