M30-3.5 X 260mm 육각 소켓 볼트 | 육각 소켓 드라이브 | 부분 나사산 | 12.9급 합금강 열처리 블랙 옥사이드

For the price, getting a partially threaded bolt this long in Class 12.9 alloy steel feels like a solid deal—the black oxide finish seems evenly applied with no splotches. It threaded smoothly into my fixture plate without any binding, and the hex socket gave a secure grip for torquing down. Exactly

The hex socket drive on these M30 screws made tightening them into my jig incredibly easy without worrying about cam-out. The thermal black oxide finish looks clean and should hold up well in my shop environment.

Finally, some screws that won't strip under heavy torque—the hex socket drive grabs perfectly, even in tight spots. The thermal black oxide finish feels tough and resists oil stains, perfect for my jig builds.