7/16-14 X 3-1/4" مسامير نقل | خيط كامل | درجة A307 فولاذ مطلي بالزنك (325 / عبوة)

The square neck under the head grabbed the wood instantly with zero spinning, which saved me a ton of frustration on a deck repair. All 325 bolts came in a sturdy box, counted right, and the zinc plating looks clean and even. These are solid for the price if you need a bulk supply.

Finally got around to using these for a deck repair and the zinc coating is holding up well against a few rainy days. The 3-1/4 inch length was just right for sandwiching two 2x6s together.

The square neck on these carriage bolts locked right into the wood as I tightened them, which made assembling the deck frame much easier than using standard hex bolts. Zinc plating looks good and the 325-count box is plenty for a big project, though I did find a few with slightly rough threads.