براغي رأس كبس M20-2.5 X 90mm | محرك سداسي | جزئي الخيوط | فئة 12.9 سبيكة فولاذية مطلية بالزنك (25/عبوة)

I needed high-strength fasteners for a press jig, and these class 12.9 screws handled the torque without stripping. The partially threaded section made alignment in blind holes much easier than expected.

Installed these on a heavy jig I was building and the partially threaded design made alignment much easier. The 12.9 alloy steel feels solid, no bending under torque.

The hex socket drive bit snugged right in with no wobble, and the zinc plating looks even and clean out of the pack. I used a full row on a jig frame and all 25 threaded in smoothly with no galling. For the price per piece, these are a solid pick.