براغي رأس أسطواني M6-1 × 165mm | محرك سداسي | جزئي الخيط | فئة 12.9 فولاذ سبائكي مؤكسد أسود حراريًا (50/عبوة)

The black oxide finish on these M6 socket cap screws looks clean and professional on my tooling jig. They threaded in smoothly with a hex key, and the 165mm length was perfect for securing thicker aluminum plates.

Used these to fix a jig that kept loosening under vibration and the 12.9 alloy steel hasn’t budged since. The partially threaded length is perfect for clamping thicker plates without bottoming out. Honestly, the black oxide finish makes them slide into the driver socket smoother than any other screw

These 165mm screws were the exact length I needed for a jig I was building, and the hex socket held the Allen key perfectly without any rounding. The black oxide finish looks clean and professional on my machine.