براغي رأس كبس مقبس M8-1.25 × 140 مم | محرك مقبس سداسي | ملولبة جزئيًا | فولاد سبائك فئة 12.9 أكسيد أسود حراري (50 / عبوة)

I used these in a jig I was building, and the 12.9 alloy steel makes them feel tougher than the usual screws I grab. The black oxide finish held up nicely against mild lubricant splashes during assembly.

The black oxide finish on these 12.9s looks proper and even, which is what I wanted for a visible tooling fixture. Threads cut cleanly into a tapped M8 block without binding, though I wish the partial thread started a bit earlier on the shaft. Solid enough for the price.

Needed a longer bolt for a recent jig project, and these 140mm ones fit the bill perfectly. The partially threaded length worked well for my assembly, though I wish the black oxide finish was a bit more consistent across all 50. They feel sturdy and strong for the price.