براغي رأس كبس M12-1.75 × 55 مم | محرك سداسي | ملولبة جزئياً | فولاذ سبيكة 12.9 أسود حراري (100 / عبوة)

Used these screws for a jig I'm building on my milling machine, and the hex socket drive held up perfectly under heavy clamping. The 12.9 alloy steel feels tough—no rounding at all after multiple uses.

The hex socket drive on these M12 screws is exactly what I needed for a tight clearance jig project, and the black oxide coating seems to resist rust well right out of the package. Fit perfectly in the tapped holes without any binding, and the partially threaded section let me get a solid clamp with

The partially threaded shank on these M12 screws made alignment in my jig much easier than fully threaded fasteners. They seated cleanly and the hex drive didn't strip out at all during assembly.