براغي رأس مقبس M36-4 × 380 مم | محرك مقبس سداسي | ملولبة جزئيًا | سبيكة فولاذ درجة 12.9 أكسيد أسود حراري

First time working with this thread size, and the 380mm length gave me just enough reach for a tricky jig frame. The black oxide finish slid right into the tapped hole without binding.

I needed heavy-duty screws for a jig build, and these M36-4 x 380mm socket caps fit perfectly with their precise threading. The hex socket drive made torquing them down effortless, even with larger tools.

The black oxide finish on these screws gives them a nice, even coating that looks like it'll hold up well in my tooling setup. The hex socket drive seated the allen key cleanly, no wobble, and the 12.9 alloy steel feels dense and rigid when I torqued it down.