M5-0.8 X 15mm ソケットキャップスクリュー | 皿頭 六角ソケットドライブ | 全ねじ | クラス12.9 合金鋼 熱処理黒色酸化皮膜 (600個/パック)

The flat heads sit perfectly flush in my jig plate, and the hex socket gave a clean bite on the first turn. For precision work like tooling, these M5s feel incredibly sturdy.

Pulled these out of the bag and the hex drive seated perfectly on my first try, no wobble at all. For 600 pieces at this price, the class 12.9 hardness gives me serious confidence for jigs and fixtures.

The black oxide finish on these has held up without a speck of rust through weeks of shop use. The hex socket drive seats cleanly and the threads cut smoothly into my fixture plates every time.