M20-2.5 X 75mm 內六角螺絲 | 內六角驅動 | 部分螺紋 | Class 12.9 合金鋼鍍鋅 (25個/包)

The hex socket drive on these M20 screws fits my tools perfectly, making assembly on my jig much smoother. The partially threaded design held tight without any slippage during testing.

I was a bit skeptical about the partially threaded design for my jig, but the threading was clean and engaged perfectly. The hex socket drive gave a solid, wobble-free fit with my Allen key. These screws feel tough and should last through many adjustments.

The zinc plating on these M20 bolts looks flawless and even, and the hex socket drive seated my Allen key perfectly on the first try. Partially threaded design grabbed cleanly in my jig setup, and the 12.9 alloy steel feels reassuringly solid for the price.