M4-0.7 x 30mm 소켓 캡 나사 | 로우 헤드 육각 소켓 드라이브 | 부분 나사산 | 클래스 8.8 합금강 (2500개/팩)

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.