براغي رأس مقبس M12-1.75 × 30 مم | محرك مقبس سداسي | ملولبة بالكامل | فولاذ سبائكي فئة 12.9 مؤكسد أسود حراريًا (100 / عبوة)

Installed these on a jig I'm building and the black oxide finish is holding up really well against cutting oil. The hex socket drive engaged cleanly without any stripping, and the threads were perfectly clean right out of the pack.

After fighting with lower-grade bolts on my mill for years, these threaded perfectly into tapped holes without binding. The black oxide finish looks clean and seems to handle oil and chips without surface rust forming.

Installed these on a jig I’m building and the hex socket seated perfectly without any stripping. The black oxide coating gives a nice consistent finish, and the 30mm length was exactly what I needed for clamping two plates.