براغي رأس أسطوانية M14-2 × 180 مم | محرك سداسي | ملولبة جزئيًا | فولاذ سبائكي فئة 12.9 مؤكسد حراريًا أسود (25/عبوة)

I needed some heavy-duty fasteners for a press jig, and these M14-2 x 180mm screws worked exactly as expected. The thermal black oxide finish feels durable, and the hex socket drive made installation straightforward with no stripping.

Picked up a set for building a custom jig, and the 12.9 grade alloy steel feels seriously tough. The black oxide finish has held up well against a few drops of cutting oil without any rust. They threaded in smoothly and snugged down tight with no wobble.

Used them to replace a stripped bolt on my press tool, and the 12.9 grade held torque way better than the old ones. The black oxide finish hasn't marked up my wrenches during installation either. Exactly what I needed for high-stress applications.