براغي رأس أسطوانية M8-1.25 X 190mm | محرك سداسي | ملولبة جزئياً | فولاذ سبائكي فئة 12.9 مطلي بالزنك (50 / عبوة)

The hex socket drive bit down into the threads cleanly every single time, and the zinc plating looks uniform across all fifty pieces. These 190mm lengths with the partial thread have been perfect for our jig setups where I need a solid grip on thick plates.

I needed some heavy-duty screws for securing a jig on a milling machine, and these 12.9 alloy steel cap screws handled the torque without any flex. The partial threading made alignment much easier than fully threaded bolts.

The length was exactly what I needed for a tooling fixture, and the zinc plating seems durable. Threading went in cleanly without any binding.