براغي رأس مقبس M27-3 × 120 مم | محرك سداسي المقبس | ملولبة جزئيًا | فئة 12.9 فولاذ سبائكي أسود حراري (5 / عبوة)

Needed some heavy-duty fasteners for a tooling jig, and the 12.9 alloy steel on these feels incredibly solid under torque. The partial threading on the 120mm length made alignment much easier than fully threaded screws would have.

The black oxide finish looks even better in person, and the hex socket drive grabbed my allen key without any slop on the first try. Threads cut clean into the jig plate, and at 120mm length they’ve got plenty of grip for heavy tooling setups.

Put these in a heavy press fixture and the 12.9 grade steel didn't budge—threads cut clean and the hex drive seated perfectly with no stripping. Exactly the grip I needed for a high-torque jig setup.