M18-2.5 x 80mm 六角頭螺絲 | 10.9級鋼 黃鋅 | 部分螺紋 (20個/包)

Used these for mounting a heavy jig fixture on a milling table, and the hex head made torquing them down a breeze. The partial threading grabbed just enough without binding in the pre-tapped holes. Solid hold with no sign of stripping under stress.

Installed these on a farm trailer hitch I've been repairing, and the hex head gave my socket a solid grip even with some rust on the bolt from storage. The partially threaded design held tight where it needed to, and the yellow zinc coating hasn't shown any wear after a week of rain.

I needed some heavy-duty bolts for a press repair, and the class 10.9 steel on these feels rock solid. The yellow zinc finish looks clean and should resist rust well in my shop.