براغي رأس أسطوانية M5-0.8 × 40 مم | محرك سداسي | ملولبة جزئيًا | فولاذ سبائكي فئة 8.8 أسود حراري (400/عبوة)

I needed some longer M5s for a jig I'm building, and the 40mm length and partially threaded design worked perfectly for clamping thick stock. The hex socket drive made tightening them down in tight spots a breeze.

The black oxide finish on these screws gave them a nice, uniform look straight out of the package, and the hex socket drive made installation a breeze on my fixture. They grabbed perfectly in the tapped holes with no stripping issues.

I needed a batch of these for a custom jig I’m building, and the partially threaded design saved me time aligning the clamp plates. The hex socket drive seated firmly without stripping, and the class 8.8 alloy steel feels tough enough for repeated adjustments.