براغي رأس أسطوانية M22-2.5 × 230 مم | محرك سداسي | خيط جزئي | فئة 12.9 من سبائك الصلب مع أكسيد أسود حراري (5 / عبوة)

I needed a high-strength screw for a jig I was building, and the 12.9 alloy steel on these feels incredibly solid. The black oxide finish also seems like it will resist wear well over time.

The partially threaded design made alignment much easier when setting up a new jig. These screws feel incredibly solid, and the black oxide finish looks clean and durable.

The hex socket drive grabbed perfectly with my torque wrench, making installation into a jig fixture much smoother than I expected. These 12.9 alloy screws feel incredibly strong for their size, and the 230mm length was just right for a deep assembly I had been struggling with.