3/8-16 X 2-1/4" 馬車螺栓 | 全牙 | A307 A級普通鋼 (625顆/包)

The square neck grabbed perfectly into the wood when I tightened them, no spinning at all. Exactly what I needed for securing heavy brackets.

Used these for a wooden gate repair and the square neck really dug in tight, no spinning at all. The fully threaded length made it easy to cut down a few with a grinder for a custom fit. Pack of 625 seems overkill but I'll use them up eventually.

The square neck underneath grabbed the wood immediately when I tightened these, so no spinning or wrestling with a wrench while I worked. Ordered the full 625-pack for a fencing project and every single one came out of the box with clean, uniform threads.