HOLO-KROME 87204 M12-1.75 X 50mm 소켓 캡 나사 | 플랫 헤드 육각 소켓 드라이브 | 합금강 열처리 블랙 옥사이드 (50개/팩)

These flat head screws fit perfectly into the counterbore holes on my jig fixture, and the black oxide finish resisted marring during assembly. The hex socket drive bit grabbed cleanly without any cam-out.

The black oxide finish held up perfectly during assembly, and the hex socket drive made it easy to torque them down precisely. I used a dozen on a press fixture and every one seated cleanly without any binding.

Finally, some bolts that actually seat flush in my jig table without that annoying gap. The black oxide finish on these screws looks professional and resists shop grime way better than I expected.