براغي رأس أسطوانية M22-2.5 × 45 مم | محرك سداسي | ملولبة بالكامل | فئة 12.9 من سبائك الصلب مع أكسيد أسود حراري (10 / عبوة)

The thermal black oxide finish on these screws handled my last job without a single chip, and the hex socket seated perfectly with my allen key every time. Class 12.9 strength gives me real peace of mind on the precision fixture I bolted together.

I've been using these on a tooling jig I built, and the black oxide finish is holding up well to some light cutting oil exposure. The 45mm length was spot-on for my needed thread engagement without bottoming out.

The hex socket drive engaged perfectly without any stripping, and the 12.9 alloy steel feels incredibly tough for my jig setup. These M22 screws are exactly the right length for my heavy machinery adjustments, and the black oxide coating looks clean and professional.