براغي ذات رأس أسطواني M4-0.7 × 10 مم | رأس مسطح بمحرك سداسي | ملولبة بالكامل | درجة 12.9 من سبائك الفولاذ بأكسيد أسود حراري (900 / عبوة)

I’ve used these in a few jigs and precision assemblies, and the hex socket drive makes them easy to seat even in tight spots. The 12.9 alloy steel feels seriously rigid, and the black oxide finish hasn’t shown any wear after repeated tightening.

The black oxide finish on these M4 screws looks great and seems durable. I used them on a jig for my router table and the hex socket drive made installation quick and easy. Exactly what I needed for precision work.

Finally, a box of 900 that actually holds its tolerance—every single screw threaded into my jig without a single stripped head. The hex socket drive bites clean, and the Class 12.9 steel feels properly rigid for tooling work. Nice to have a bulk pack that doesn't come with duds.