M24-3 X 60mm 소켓 캡 나사 | 납작 머리 육각 소켓 드라이브 | 전체 나사산 | 클래스 12.9 합금강 열처리 블랙 옥사이드 (10 / 팩)

Used a few of these for a jig I’m building, and the 12.9 grade is definitely noticeable—no stripping under heavy torque. The black oxide coating seems tough and hasn’t chipped during installation.

The hex socket drive gripped my bit perfectly, so these M24-3 x 60mm screws installed smoothly into my jig without any cam-out. At Class 12.9, they feel much stronger than the standard hardware I usually use for tooling.

The black oxide finish on these M24 screws is perfectly uniform, and the hex socket drove in without any stripping. They feel rock-solid in my precision fixture, exactly what I needed for a tight tolerance setup.