براغي رأس مقبس M20-2.5 × 140mm | محرك سداسي | ملولبة جزئياً | فولاذ سبائكي درجة 8.8 مؤكسد أسود حراري (10 / عبوة)

Finally found the right thread length for my tooling fixtures. The hex socket drive seated perfectly with a standard Allen key, and the partially threaded design gives me just enough grip without bottoming out.

The black oxide finish on these M20 screws is what sold me—they look clean and professional in my tooling setup. Threads cut smoothly when I torqued them in, and the 8.8 alloy steel feels plenty stout for the precision assembly work I've been doing.

Used these for a custom jig build and the partially threaded shank made alignment so much easier than fully threaded bolts. Held up perfectly under heavy clamping pressure without any stripping.