براغي ذات رأس أسطواني M24-3 × 80mm | محرك سداسي داخلي | ملولبة بالكامل | فئة 8.8 فولاذ سبائكي أكسيد أسود حراري (10 / عبوة)

Installed these on a precision assembly fixture I'm building, and the hex socket drive made tightening them in tight spots much easier. The black oxide finish also seems like it'll resist wear better than the plain steel ones I used last time.

The black oxide finish on these screws is really consistent and seems like it'll hold up well in my jig setup. They threaded in smoothly with no binding at all. Exactly what I needed for a solid hold on a tooling fixture.

I needed a stronger bolt for a heavy-duty press assembly, and these M24-3 x 80mm screws with the hex socket drive tightened up just right. The black oxide finish really helps them resist rust in my oily workshop environment.