براغي رأس أسطواني M8-1.25 × 16 مم | رأس دائري بمحرك سداسي داخلي | كامل الخيط | درجة 10.9 من سبائك الصلب معالجة حرارياً بأكسيد أسود (400 / عبوة)

Used a handful of these to mount some jig guides onto a steel frame, and the hex socket drive made them easy to seat with a ball-end driver. The 10.9 alloy steel feels solid enough for heavy use, and the black oxide finish hasn't shown any wear from the initial tightening.

The black oxide finish looks sharp and held up well while assembling a jig at my shop. Threads were clean and consistent across all 400, and the Class 10.9 steel feels plenty sturdy for the precision tooling I used them on. Fit the M8 hex wrench snugly, no stripped heads.

Used them on a custom fixture I’m building and the black oxide finish is holding up nicely against tooling oil. The hex socket drive grips well without stripping.