HOLO-KROME 76064 براغي رأس مقبس M4-0.7 × 12 مم | محرك مقبس سداسي | سبائك فولاذ أكسيد أسود حراري (100 / عبوة)

The socket drive on these M4-0.7 x 12mm screws bites perfectly with a hex key—no stripping even when I torqued them down on a jig fixture. The black oxide finish looks clean and hasn't chipped during assembly. Solid buy for precision work.

I was skeptical about the black oxide finish holding up, but after using a dozen of these in a jig build, they’ve resisted wear better than the zinc-plated ones I usually get. The hex socket drive makes them much easier to work with in tight spaces.

These M4 screws fit perfectly into my jig setup, and the hex socket drive made tightening them a breeze without any stripping. The alloy steel feels solid and durable for repeated use in my precision assemblies.