M12-1.75 X 35mm 소켓 캡 나사 | 접시머리 육각 소켓 드라이브 | 풀 나사산 | 10.9급 합금강 열처리 흑색 산화피막 (100개/팩)

I was a bit worried about the finish after reading some reviews, but the black oxide is uniform and the threads are clean on every single one of the 100. The hex socket drive fit my tool perfectly, no wobble, and they torqued down nicely for my jig setup.

The hex socket drive on these M12 screws fits my Allen wrench perfectly with no wobble, and the black oxide coating looks clean and durable. They worked great for securing a jig fixture on my drill press table.

Took these out of the package and checked the black oxide finish right away —uniform and clean, no flaking. Threads are smooth all the way, and the full threading made alignment in my jig way easier than I expected. Already torqued a few down to spec without any stripping worries.