مسامير عربة مقاس 5/16-18 × 5-1/2 بوصة | ملولبة بالكامل | فولاذ مطلي بالزنك من الدرجة A307 (50 / عبوة)

The square neck on these carriage bolts grabbed the wood perfectly, so I didn't need a wrench to hold them while tightening the nut. These are solid for a heavy gate hinge I installed, and the zinc plating looks clean against the exposed metal.

I needed some heavy-duty bolts for a pergola project, and these 5-1/2" carriage bolts were just the right length to secure the beams. The fully threaded shaft made installation smooth, and the zinc coating looks like it'll hold up well outdoors.

The square neck under the head seated perfectly into the pre-drilled holes on my trailer hitch, so I didn’t need a wrench to hold them steady while tightening. Zinc coating looks clean and even, and all 50 threads were consistent with no burs.