2-4-1/2 X 3인치 소켓 캡 나사 | 육각 소켓 드라이브 | 풀 나사산 | 합금강 열 블랙 옥사이드

I needed some heavy-duty fasteners for a custom jig setup, and these socket cap screws threaded perfectly with no binding. The hex drive seated firmly without stripping, which made assembly much smoother than with standard bolts.

The black oxide finish is holding up perfectly on my machinery setup, and the hex socket drive grips cleanly with no rounding. Threads ran smooth all the way down and these feel rock solid for tooling work.

Got these for a jig I’m building and the black oxide finish feels slick and durable, not cheap. The hex socket drive seated perfectly with no wobble, and the full threading grabbed nicely in tapped holes. Solid buy for the price.