براغي رأس أسطوانية M4-0.7 × 30 مم | رأس منخفض محرك سداسي | ملولبة جزئيًا | فولاذ سبائكي درجة 8.8 (2500 / عبوة)

Used a full box on a set of custom tooling fixtures and every single screw seated perfectly without any stripped heads. The low head design is really handy for tight clearance spots where a standard cap screw won't fit.

Bought these for a batch of precision jigs and the partially threaded section is exactly what I needed for clean clamping. All 2500 arrived with uniform threads and the hex sockets were crisp, no stripped drives. Class 8.8 alloy feels solid for the price, definitely ordering again.

I was a bit worried about the hex socket stripping under high torque, but these hold up perfectly on my press tooling. The partially threaded shank makes alignment a breeze during assembly.