1/4-20 x 3-1/4" 馬車螺栓 | 全螺紋 | A307 A級鍍鋅鋼 (150 個/包)

The zinc plating on these bolts looks clean and even, and the fully threaded design made them much easier to work with than I expected. I used a dozen to secure a heavy bench to the wall, and they held firm with no slipping.

The square neck grabbed the wood instantly—no spinning or cussing trying to hold the head still. Fully threaded meant I could stack washers and a lock nut without running out of threads on a 3-1/4" length. Zinc plating looks clean and hasn't shown a speck of rust after two weeks on the patio frame.

These bolts fit perfectly into the pre-drilled holes on my deck boards and the threads are clean and consistent. For 150 pieces at this price, you can't beat the value when you're working on a big project.