M18-2.5 × 45 مم براغي رأس كبس بمقبس سداسي | مشدودة بالكامل | فئة 12.9 سبيكة فولاذ مطلية بالزنك (25 / عبوة)

The hex socket drive on these screws is just deep enough that my Allen wrench gets a solid bite without slipping. They’re holding up well under the repeated torque adjustments I’ve been making on my custom tooling setup.

These fit perfectly into the jig I'm building, and the 12.9 alloy steel feels noticeably tougher than the standard stuff. The hex drive seated cleanly with no stripping, which was my main worry.

Had to replace some bolts on a milling fixture, and these class 12.9 screws handled the torque without any sign of stripping. The zinc plating looks clean and hasn't shown a speck of rust after a few weeks in a damp shop.