براغي رأس مقبس M36-4 × 150 مم | محرك سداسي | ملولبة جزئيًا | فئة 12.9 من سبائك الصلب مع أكسيد أسود حراري

Installed these on a heavy-duty machine base and the hex socket drive made tightening precise in tight spots. The black oxide finish seems durable and hasn't shown any wear after repeated adjustments.

These M36-4 x 150mm screws are solidly built with the black oxide finish looking clean and uniform right out of the bag. The partially threaded design seated perfectly in my jig setup, and the hex socket drive took torque without any stripping.

I was a bit worried about the partially threaded length, but these fit perfectly in my jig setup. The black oxide finish is holding up well, no rust or wear after a month of use.