براغي رأس كبس بمقبس سداسي M10-1.5 × 280 مم | مشقصة جزئيًا | فولاذ سبائكي فئة 12.9 مع أكسيد أسود حراري (25 / عبوة)

The 280mm length is exactly what I needed for a through-hole assembly, and the partially threaded design gave me solid clamping without bottoming out. The black oxide finish feels properly done too, not just a cheap dip.

Needed extra-long bolts for a custom jig, and these 280mm M10s were the perfect fit with their high 12.9 rating. The black oxide finish is holding up great against minor oil splashes, and the hex socket drive made alignment straightforward.

I was a bit skeptical about the 12.9 alloy steel being overkill for my tooling jigs, but the black oxide finish is holding up beautifully against daily use. The hex socket drive matched my torque wrench perfectly, making installation a breeze.