براغي ذات رأس مقبس M12-1.75 × 90 مم | محرك سداسي المقبس | ملولبة جزئيًا | فئة 12.9 فولاذ سبائكي أسود حراري (50/عبوة)

Installed these on a custom jig I'm building and the partially threaded design gave me exactly the grip length I needed. The black oxide finish looks clean and hasn't shown any wear after several adjustments.

The hex socket drive seated perfectly on my Allen key with zero wobble, and the 12.9 alloy steel feels rock-solid under torque. I used them to bolt down a jig plate and the partial threading grabbed cleanly—no stripped threads or fuss. Exactly what I needed for precision work.

The black oxide finish on these screws looks clean and uniform, and the hex socket drive seated perfectly on my Allen key without any wobble. Used them to bolt down a steel base plate for a small press—the 12.9 alloy steel feels seriously solid.