M6-1 x 80mm 內六角螺絲 | 圓頭內六角驅動 | 全螺紋 | 10.9級合金鋼 熱處理黑氧化物 (200入/包)

Installed these in a jig for a precision assembly and the hex socket drove smoothly without stripping. The 80mm length was exactly what I needed for that particular application, and the black oxide coating looks consistent across all 200 pieces.

The black oxide finish on these M6 screws looks consistent across all 200 pieces, and the hex socket drive engaged perfectly with my allen key without any stripping. They held firm in a jig I’m building for a production run, which is exactly what I needed for Class 10.9 strength.

I’ve been using these M6 socket cap screws for a few jig builds, and the black oxide finish holds up well against minor shop dust. The 80mm length was perfect for clamping thicker material together. Solid grip too—the hex socket never rounded out when torquing to spec.