M16-2 X 110mm براغي مقبس | رأس مسطح محرك سداسي | جزئية الخيوط | فئة 12.9 فولاذ سبائكي أسود حراري (25 / عبوة)

Installed these on a heavy jig fixture I'm building, and the partially threaded design grabbed perfectly in the blind hole. Class 12.9 rating gave me confidence cranking them down without worrying about stripping.

Installed a dozen of these on a new jig fixture and the flat head hex socket seated perfectly flush every time. The black oxide coating has a nice even finish and seems like it'll hold up well in the shop.

Threads are so clean they screwed down smooth as butter on my jig plate. The black oxide finish looks sharp and seems to resist shop grime well, and that 12.9 hardness rating gives me peace of mind under heavy clamping load. Already ordered another pack for the next project.