براغي ذات رأس أسطواني مجوف M5-0.8 × 30 مم | محرك سداسي داخلي | ملولبة جزئيًا | فئة 12.9 من سبائك الفولاذ مؤكسد أسود حراريًا (600/عبوة)

I’ve been using these for a jig I’m building and the thermal black oxide finish is holding up really nicely, no chips so far. The 30mm length with partial threading gave me just the right amount of grip without bottoming out, and the 12.9 alloy steel feels plenty strong for the torque I’m applying.

The partially threaded shank made alignment much easier on my jig builds, and all 600 heads were clean without any stripped sockets. A solid step up from cheaper hardware I've used before.

The thermal black oxide finish on these looks uniform across all 600 pieces, and the hex socket drive seats my Allen key perfectly with zero wobble. For jig building they’ve got just enough thread length to grab securely, and the 12.9 alloy steel feels reassuringly rigid.