براغي رأس مقبس M30-3.5 × 150 مم | محرك مقبس سداسي | ملولبة جزئيًا | فولاد سبائكي فئة 12.9 مؤكسد أسود حراري (5 / عبوة)

Installed these on a precision fixture at work, and the 150mm length gave just enough thread engagement for a thick steel plate. The black oxide coating has a nice matte finish that resists minor scuffs during assembly.

The hex socket drive engaged perfectly with my torque wrench, and the thermal black oxide finish looks like it’ll resist rust on my jig build. Exactly what I needed for a heavy tooling fixture.

These screws are seriously beefy—the Class 12.9 alloy steel feels incredibly rigid for my jig builds. The hex socket drive made tightening them down a breeze without any stripping. Exactly the kind of heavy-duty hardware I needed for tooling.