M6-1 X 50mm 소켓 캡 나사 | 버튼 헤드 육각 소켓 드라이브 | 전체 나사산 | 클래스 12.9 합금강 열처리 블랙 옥사이드 (200개/팩)

I needed a batch of high-strength bolts for a shop fixture, and these Class 12.9 hex screws are noticeably tougher than standard ones I've used before. The button head and anodized finish fit flush in my jig without snagging.

These came in a plain box with a solid 200 count, and the black oxide finish looks evenly applied across every single one. Threads were clean and the hex socket seated my driver without any slop, which is exactly what I want for jigs and fixture plates.

Had to replace a stripped screw on my milling machine jig, and these 12.9 alloy steel button heads fit perfectly and torqued down solid. The hex drive gripped without rounding—exactly what I needed for a precision setup.