براغي رأس مقبس M30-3.5 × 90 مم | محرك مقبس سداسي | ملولبة بالكامل | فئة 12.9 سبيكة فولاذ أكسيد أسود حراري (5 / عبوة)

The black oxide coating on these gives them a nice grip without being sticky, and the hex socket drive made torquing them down into my machine frame a breeze. For the price per piece, the 12.9 alloy steel feels like serious overkill for my home shop, but I’ll take the durability.

These screws fit perfectly into my jig's threaded holes, and the 90mm length was just what I needed for a thick assembly. The hex socket drive made torquing them down easy with a simple allen key.

The black oxide finish on these M30 screws gives them a nice, consistent look and they threaded into my jig smoothly without binding. The hex socket drive held up well under the impact wrench, and the 12.9 grade steel feels solid for the heavy clamping force needed. Exactly what I needed for a sturd