1/4-20 X 1인치 소켓 캡 나사 | 낮은 헤드 육각 소켓 드라이브 | 합금강 열처리 블랙 옥사이드 (200개/팩)

The black oxide finish is exactly what I wanted for a jig I’m building—no glare, and it looks sharp against the steel table. I used about 30 of them to hold down a fixture plate, and every single one threaded cleanly into the tapped holes without any binding. Half the box is still full for the next

The hex socket drive grips the Allen key perfectly without slipping, and the low head profile is a lifesaver in tight spots on my jig setup. I’ve put about 80 of these into a precision assembly so far, and every thread has been clean—no binding or stripped heads.

The black oxide finish on these screws gives them a nice, uniform look that resists rust way better than the plain zinc ones I've used before. The hex socket drive grabbed my Allen key cleanly on every single one out of the 200-pack, no stripped heads or wobble during assembly.