براغي رأس مقبس M4-0.7 × 35 مم | رأس مسطح محرك سداسي المقبس | ملولبة جزئيًا | فولاذ سبائكي فئة 12.9 مؤكسد أسود حراريًا (400 / عبوة)

I needed a batch of strong M4 screws for a repair fixture, and these class 12.9 alloy steel bolts held up perfectly under torque. The black oxide finish gives them a nice, uniform look, and the 400 count means I have plenty of spares for future projects.

The flat head sits flush against my jig table, and the hex socket drive made installation quick without stripping. The black oxide finish looks clean and professional on my precision assembly project.

These hex screws fit perfectly in my tooling jig fixture, and the black oxide coating seems like it will hold up well to shop use. I was also impressed that the hex socket drive didn't strip out even when torqued down tight. The class 12.9 steel definitely feels stronger than the standard ones I’ve