براغي رأس سوكيت M20-2.5 × 75 مم | محرك سداسي داخلي | سنون جزئية | فولاذ سبائكي فئة 12.9 مؤكسد أسود حراريًا (25 / عبوة)

Installed these on a heavy-duty tooling fixture and the Class 12.9 alloy steel gave me confidence it won't strip under torque. The thermal black oxide coating also adds a nice, uniform finish that resists light corrosion in my shop.

I needed a high-strength bolt for a jig I'm building, and these 12.9 alloy steel screws are definitely up to the task. The hex socket drive makes installation quick with a standard Allen key.

The partially threaded design on these 75mm screws made alignment in my jig setup a breeze, and the hex socket drive held the wrench firmly without any stripping. The thermal black oxide finish looks sharp and feels tough, exactly what I needed for a precision assembly.