براغي رأس مقبس M27-3 × 400 مم | محرك مقبس سداسي | ملولبة جزئيًا | فئة 12.9 سبيكة فولاذية أكسيد أسود حراري

Used them on a custom jig build where I needed real holding force, and the 12.9 alloy steel didn't flex a millimeter under load. The partially threaded length gave me just enough grip without bottoming out, and the hex socket drive made torquing them down with a long allen key way easier than I expe

The black oxide finish on these screws feels incredibly durable, and the hex socket drive made installation much easier than I expected with a standard wrench.

Had to torque these down for a press fixture, and the hex socket drive engaged perfectly without stripping the head. The black oxide finish looks clean and matches the tooling setup nicely.