براغي رأس مقبس M3-0.5 × 14 مم | رأس زر محرك مقبس سداسي | ملولبة بالكامل | فولاذ سبائكي فئة 12.9 مع أكسيد أسود حراري (600/عبوة)

Installing these on a jig I’m building; the black oxide finish is uniform and the threads cut cleanly into the aluminum. For the price per piece, you get a lot of fasteners that feel solid enough for industrial use.

The hex socket drive makes these much easier to torque down than slotted screws, and the black oxide finish gives them a clean look on my jig. For the price of 600 pieces, I'm set for quite a few projects.

Finally, a box of 600 M3 screws that are actually all the same length and thread pitch—no digging through mixed junk. The 12.9 alloy steel feels rock solid, and the hex socket drive bit seated perfectly without any stripping on the first dozen I used in my jig.