HOLO-KROME 76028 براغي رأس كوب M3-0.5 X 16mm | محرك سداسي | فولاذ سبائكي بأكسيد أسود حراري (100 / عبوة)

Used these to replace worn screws in a small jig, and the black oxide finish made them slide right into the tapped holes without binding. The 16mm length was perfect for the assembly, and the hex drive held the allen key firmly without stripping, even under moderate torque.

The hex socket drive engaged perfectly with my Allen key, making installation into my jig faster than with standard Phillips heads. For M3 precision parts, these feel robust and should hold up well under repeated use.

The black oxide finish on these M3 screws looks clean and seems durable—they seated perfectly into my 3D printer’s aluminum extrusions without any stripping. The hex drive fit my driver tightly, making assembly quick.