HOLO-KROME 86045 M8-1.25 x 20mm 소켓 캡 볼트 | 버튼 헤드 육각 소켓 드라이브 | 합금강 열처리 블랙 옥사이드 (100개/팩)

These button heads fit perfectly into my milling machine's T-slots, and the black oxide finish hasn't scratched after a dozen installs. The hex drive seated without stripping, which is a relief for repetitive assembly work.

Jigs and fixture plates always beat up fasteners, but these M8s have held up through a full week of heavy clamping without a single stripped head. The 20mm length sits perfectly flush in my aluminum tooling blocks, and the thermal black oxide takes oil without smudging.

Just got these in for a jig I was building — the black oxide finish looks clean and seems like it'll hold up way better than plain steel. The button head shape fits flush into my fixture plate recess perfectly, which was exactly what I needed.