براغي M42-4.5 × 160 مم برأس مقبس | محرك مقبس سداسي | ملولبة جزئيًا | فولاذ سبائكي فئة 12.9 مؤكسد حراري أسود

The black oxide finish on these screws looks great and seems like it will hold up well in my shop jigs. The hex socket drive made installation straightforward with a standard Allen key, and the partial threading gives good grip. Exactly what I needed for a precise assembly project.

Used these for a heavy-duty jig setup in the shop, and the 160mm length gave just the right grip in thick steel. The partially threaded design made alignment a breeze during assembly.

The black oxide finish on these is flawless, and the threads are cut so cleanly they seated into my jig without any binding. For a 160mm screw this size, the class 12.9 hardness gives me real confidence in the tooling setup.