هولو-كروم 76541 براغي رأس مقبس M20-2.5 × 160 مم | محرك مقبس سداسي | سبيكة فولاذية بأكسيد أسود حراري (10 / عبوة)

The black oxide finish looks proper and even across all ten screws, and threading them into my fixture plate felt smooth with no binding. These M20s are solid enough that I grabbed a second pack for the next project.

I needed some heavy duty screws for a jig I was building, and these M20s fit perfectly with plenty of thread engagement. The 160mm length gave me the reach I needed, and the black oxide coating seems durable so far.

The black oxide finish on these is flawless—no rough edges or flaking when I torqued them into my fixture plate. They seated cleanly in the socket drive and held tight through a full day of milling runs. Definitely my go-to for jig work from now on.