HOLO-KROME 76218 براغي ذات رأس أسطواني M6-1 × 90 مم | محرك سداسي | سبائك فولاذ معالجة حرارياً بأكسيد أسود (100/عبوة)

Installed these on a milling fixture and the black oxide finish held up perfectly against coolant splashes. The 90mm length was just right for clamping thicker workpieces securely.

Used these for a jig I was building, and the M6-1 x 90mm length was exactly what I needed for clamping thick stock. The hex socket drive seated perfectly without any stripping.

The black oxide finish on these screws is incredibly uniform, and the hex drive held up perfectly when torquing them into a precision assembly. For 90mm length, the thread engagement feels spot-on for thicker tooling jigs. Exactly what my machine setup needed.