5/16-18 X 5" 馬車螺栓 | 全螺紋 | A307 Grade A 鍍鋅鋼 (100 個/包)

Used a full box of these for a deck repair and every single one seated flush without spinning once, the square neck does exactly what it should. The zinc coating looks clean and even, and the full threading made driving them into pressure-treated lumber a breeze. For the price per hundred, this is a

The square neck grabbed the wood instantly with my impact driver, no spinning or cursing like with cheaper hex bolts. Zinc plating looks clean and even across all hundred, and the threads are sharp enough to start by hand.

The fully threaded length made these way more versatile than the half-threaded ones I've grabbed before, and the zinc coating looks clean and even on every single bolt. I used them for a deck repair and the square neck seated solidly into the wood, no spinning at all.