براغي رأس سداسية M12-1.5 × 100 مم | فولاذ عادي فئة 8.8 | ملولبة جزئيًا (50 / عبوة)

The partially threaded length is just right for grabbing a full nut with room to spare on my assembly jig. All fifty came with clean, sharp threads and the hex heads seated perfectly under a socket wrench.

Used these to bolt down a heavy motor mount and the 8.8 grade steel held torque without any stripping. The partial threading made alignment much easier than fully threaded bolts would have.

Threaded exactly where I needed them for a machinery jig, and the 8.8 steel feels solid under a socket wrench. The partially threaded design gave just the right grip without fighting threads the whole way.