براغي رأس أسطوانية M12-1.75 X 90mm | محرك سداسي داخلي | ملولبة جزئياً | فئة 8.8 من سبائك الصلب أكسيد أسود حراري (50 / عبوة)

Had to swap out some old bolts on a heavy jig table, and these threaded in smoothly with no binding. The black oxide finish looks clean and should hold up well against shop grime.

Torqued these down to spec on a new fixture plate and the hex socket drive took the wrench without any rounding. The 90mm length was just right for the through-hole and the black oxide looks clean, no chips on the coating after install.

The black oxide finish on these M12 screws held up perfectly against the slight moisture in my shop while building jigs. Thread engagement was clean and consistent through all 50 pieces, making assembly much smoother than cheaper alternatives I've tried.