M8-1.25 X 50mm 육각 소켓 볼트 | 평 머리, 육각 드라이브 | 부분 나사산 | 클래스 10.9 합금강 열처리 블랙 옥사이드 (200개/팩)

The threads are cut clean and the black oxide finish looks uniform across all 200 pieces, which saves me from sorting through rejects. The partially threaded design gives solid clamping without bottoming out, and the hex socket drive seated perfectly with my standard allen key.

I needed a batch for a custom jig build and these flat head screws seated perfectly flush, which saved me time countersinking. The partially threaded shaft gave just the right grip depth without bottoming out. Solid value for a 200-pack.

The hex socket drive on these screws lets me tighten them quickly without stripping, and the 200-count box means I'm set for several machinery repair jobs. The thermal black oxide finish already seems tougher than the plain steel ones I used before.