六角頭螺絲 M42-4.5 x 200mm | 強度等級8.8 鋼 無鍍 (8入/包)

I used these to secure a press bed, and the Class 8.8 rating gives me confidence they won't strip under heavy vibration. The hex heads fit a socket wrench perfectly, so tightening them down was straightforward even with limited clearance.

I needed these for a heavy equipment repair, and the hex head made it easy to get a socket on them in a tight spot. The 200mm length was just right for the application, and the class 8.8 steel feels solid.

The threads on these M42 bolts are cut clean and the hex heads seated perfectly into my socket without any wobble. Class 8.8 steel feels reassuringly solid for the machine frame I bolted together, and the 200mm length gave me just enough grip through the flanges. Solid pack of eight for the price.