براغي ذات رأس مقبس M16-2 X 70mm | محرك مقبس سداسي | ملولبة جزئياً | فئة 12.9 سبائك فولاذية مؤكسدة سوداء حرارياً (25 / عبوة)

I needed these for a jig I’m building, and the partially threaded design made alignment a lot easier than fully threaded screws. The hex socket drive bites well without stripping, even torquing down to spec.

The black oxide finish is holding up well after a week in a wet shop environment, and the hex socket drive grabs cleanly without stripping. For 12.9 alloy steel at this price per piece, the thread tolerance feels spot-on for jig alignment work. These went in easier than I expected for M16s.

The partially threaded design made mounting these on my jig plate much easier than fully threaded bolts, and the black oxide finish seems tough. They seated cleanly with no binding in the threaded holes I tapped.