3/8-16 X 1-1/4" 馬車螺絲 | 全牙 | A307 A級普通鋼 (875顆/包)

The square neck grabbed instantly when I tightened them on my trailer floor — no spinning or cursing this time. For the price per bolt, plain steel is exactly what I needed for indoor framing.

I needed a full 875-count box for a deck project, and these carriage bolts were perfectly formed with a smooth round head and sharp threads. The square neck grabbed the wood tight right away so I didn't have to hold the bolt with a wrench.

The square neck under the head grips the wood immediately, so I didn't need a second wrench to hold them in place. The 875 count is plenty for framing and they're plain steel, so just remember to oil them if they'll see weather.