5/8-11 X 8" 六角頭螺絲 | 8級鋼鍍鋅 | 部分螺紋（每包55顆）

The zinc plating on these held up well when I torqued them down with an impact wrench, no stripped hex heads. For the price per package, getting 55 partially threaded grade 8s this size feels like a solid deal.

The threads caught perfectly with my impact wrench, and the zinc plating on these grade 8 bolts feels tough enough to handle heavy machinery without rusting. I used them to mount a large shop press and the 8-inch length gave me just enough room for thick steel plates.

I needed some heavy-duty bolts for a shop press build, and these grade 8 hex heads are definitely tough enough for that kind of load. The zinc plating looks good and should resist rust in my garage, and the 55-piece pack gives plenty of extras for future projects.