M12-1.75 X 130mm 소켓 캡 나사 | 육각 드라이브 | 부분 나사산 | 클래스 12.9 합금강 열처리 블랙 옥사이드 (25/팩)

The black oxide finish on these screws looks great and seems to hold up well against surface rust. I used them to secure a new jig in my workshop, and the hex socket made driving them flush a breeze.

Used these in a precision assembly I've been working on—the 12.9 alloy steel feels noticeably tougher than standard screws I've tried before. The hex socket drive gave me solid torque without stripping, and the black oxide coating looks clean and ready for heavy use. Perfect fit for my jig setup.

Installed these in a custom tooling jig I was building and the hex socket drive gave a solid bite without any stripping. The 130mm length was exactly what I needed to reach through a thick plate, and the black oxide finish looks clean.