براغي M4-0.7 × 12mm ذات رأس مقبس | رأس مسطح مع محرك سداسي | ملولبة بالكامل | فولاذ سبائكي من الفئة 12.9 مع أكسيد أسود حراري (900 / عبوة)

The black oxide finish on these M4 screws gives them a nice grip in the wrench, and the 12.9 alloy steel feels seriously tough. Threads were clean all the way down, no burrs or binding when I seated them into my tooling fixture. For a 900-pack at this price, they're a solid buy.

I’ve been using these for a jig I’m building, and the black oxide finish hasn’t worn or rusted even after a few days of clamping and unclamping. The 12.9 alloy steel feels seriously sturdy, and the threading is clean all the way down—no fighting to get them started.

The hex socket drive grabbed perfectly on my jig build—no stripping even under heavy torque. These bolts feel tough and consistent straight out of the bag, with a smooth black oxide finish that resists scratches.