M6-1 X 50mm 소켓 캡 나사 | 플랫 헤드 육각 드라이브 | 부분 나사산 | 클래스 10.9 합금강 아연 도금 (200 / 팩)

I was a little worried about the partially threaded design for my jig setup, but the 10.9 alloy steel feels rock solid and the zinc plating has a nice, even finish. They threaded into my fixtures cleanly without any binding, and the 50mm length was perfect for the depth I needed.

The hex socket drive sits deep enough that my Allen key didn’t slip once during assembly, and the zinc plating looks even and clean across all 200 pieces. I’ve torqued a few into a steel jig and the 10.9 hardness feels solid—just wish the threads ran a bit further up the shaft for my setup, but thes

I needed a solid batch of 50mm partially threaded screws for a jig build, and these fit perfectly with no chips in the zinc finish. The hex socket drive gripped tight without stripping, even at higher torque.