براغي ذات رأس أسطواني M18-2.5 × 160 مم | محرك سداسي | ملولبة جزئيًا | فولاذ سبائكي فئة 12.9 أسود حراري (10/عبوة)

I needed some heavy-duty screws for a jig I was building, and these 160mm ones had the perfect partially threaded design for a secure hold. The hex socket drive made installation really easy with my Allen key, and they feel solid enough for machinery work.

Finally got these for a precision assembly project where partial thread was needed, and the 12.9 alloy steel held up perfectly under high torque without stripping. Black oxide finish looks clean and didn't flake during installation.

Had to replace a jig fixture on a milling machine and these class 12.9 screws handled the torque without any issues. The thermal black oxide coating seems like it'll resist corrosion better than the plain steel ones I used before.