M8-1.25 x 60mm 內六角螺絲 | 低頭內六角驅動 | 部分螺紋 | 10.9級合金鋼 熱處理黑氧化物 (100顆/包)

The low head profile was exactly what I needed for a tight clearance on a jig I’m building. Class 10.9 and the black oxide finish feel robust, and the partial threading made alignment easier than fully threaded bolts.

These partially threaded screws held the tension perfectly when I used them on a jig for a sheet metal fixture. The thermal black oxide coating seems to resist the light welding spatter that usually ruins standard hardware. Exactly what I needed for tooling applications.

Had to swap out some old bolts on a jig and these threaded in perfectly—the 60mm length was exactly what I needed. The black oxide finish looks solid and feels like it'll hold up better than the zinc stuff I used before.