براغي ذات رأس أسطواني M6-1 × 30 مم | محرك سداسي داخلي | ملولبة بالكامل | فئة 8.8 سبائك فولاذ أكسيد أسود حراري (400/عبوة)

Installed these in a jig I was building and the hex drive seated perfectly without stripping. The black oxide coating gives them a nice, uniform look and seems to resist surface rust so far.

Bought these for a repair on a milling machine and the black oxide finish is holding up well against the cutting oil. The hex socket drive made installation much easier than a regular hex head, and the whole pack was well-seated in the box.

I needed a bulk pack for a jig assembly project, and the black oxide coating on these screws gives them a nice, uniform finish that resists rust well. The hex socket drive made installation quick and clean with no cam-out issues. Really solid hardware for the price.