M8-1.25×35mm ソケットキャップスクリュー | 六角穴付きボタンヘッド | 全ねじ | クラス12.9 合金鋼 熱処理黒染め (200本/袋)

For a bulk pack of fasteners, the finish is remarkably consistent across all 200 pieces—no stripped threads or burrs out of the box. The black oxide coating has held up well on my tooling fixtures without rusting, and the hex socket drive sits deep and clean for a snug wrench fit.

I used these to rebuild a jig for my CNC router, and the hex socket drive made torquing them down clean and precise. The black oxide finish held up well against minor coolant splashes, which was a nice surprise for this price point.

Finally, a fastener that doesn't strip under heavy torque — the hex socket drive held perfectly when I was securing a steel fixture. The black oxide finish looks professional and seems to resist surface rust well.