براغي رأس مقبس M18-2.5 × 90 مم | محرك مقبس سداسي | جزئية الخيوط | سبيكة فولاذ درجة 12.9 مطلية بالزنك (25 / عبوة)

The hex drive seated perfectly on my torque wrench without slipping, and these 12.9-grade screws felt noticeably sturdier than the standard hardware I usually buy. Used them to secure the base plate on a jig, and they hold tight under load.

Threads cut clean and the zinc plating took a beating without a scratch when I dropped one on the concrete floor. The 12.9 alloy steel feels properly rigid, and the partial threads seated perfectly in my precision assembly jig. Paid a fair price for the 25-count pack.

Installed these on a heavy jig I was building, and the 12.9 alloy steel feels seriously solid. The partial threading gave just enough grip without bottoming out in the blind hole.