براغي رأس مقبس M4-0.7 × 30 مم | رأس مسطح محرك مقبس سداسي | ملولبة جزئيًا | سبيكة فولاذ فئة 10.9 أكسيد أسود حراري (600 / عبوة)

The partially threaded design on these M4 screws makes them perfect for jig setups where you need some grip before clamping down. The black oxide finish looks clean and professional once installed. Exactly what my precision assembly needed.

Finally found some M4 cap screws with partial threading — these hold my jig firmly without slipping in the hex socket. The black oxide finish looks clean and the 30mm length was perfect for my precision assembly setup.

I've been using these for machining fixture setups, and the partially threaded design really helps grip securely without stripping. The black oxide finish also seems to handle oil and coolant better than expected.