M8-1.25 X 16mm 六角穴付きボルト | 皿穴六角 | 全ねじ | 12.9 級合金鋼亜鉛メッキ (200 本/パック)

The hex socket drive sits flush like a dream in my jig table, and the zinc plating hasn't shown a speck of rust after a week of oily shop use. Class 12.9 strength means I torqued them down hard without a single stripped head, which is exactly what I needed for these fixture plates.

I needed some high-strength screws for a jig I was building, and these M8s with the 12.9 alloy steel feel incredibly solid. They seated perfectly flush with the flat head design, which saved me from having to countersink. The zinc plating seems uniform and should hold up well in my shop.

The hex socket drive on these screws grabbed my Allen key perfectly, no stripping at all during assembly. For M8 hardware at this length, the Class 12.9 hardness is exactly what I needed for a tight tooling fixture.