M20-2.5 x 150mm 소켓 캡 스크류 | 접시머리 육각 소켓 드라이브 | 부분 나사산 | 12.9급 합금강 열처리 블랙 옥사이드 (10개/팩)

I’ve used these in a couple of jig builds so far, and the partially threaded length is exactly right for clamping thick plates without bottoming out. The hex socket drive is machined clean, so my Allen key seated snugly with zero wobble. At this price for ten pieces, they’re a solid buy for any benc

The threading on these is cut clean and the black oxide finish feels properly done—no rough edges straight out of the pack. I torqued them into a precision assembly and the hex drive seated perfectly without any stripping.

The black oxide finish looks properly uniform and the 12.9 grade steel feels reassuringly dense in hand, which is exactly what you want for a jig setup. Threads are clean and the partial threading stops right where it should for my application. Used them to bolt down a heavy fixture and they haven’t