M10 X 50mm 內六角肩螺絲 | 內六角頭 | 內六角驅動 | 合金鋼 (25 / 包)

The precision-ground shoulder on these made aligning them as bearing axles effortless—zero wobble once torqued down. The hex socket drive bit cleanly and the alloy steel feels solid enough for repeated load cycles.

I needed these for a small robotics project where the shoulder acts as a bearing surface, and the hex socket drive made installation much easier than a standard bolt.

The precision-ground shoulder on these made aligning them for a custom jig axle much smoother than I expected. They’re definitely a solid upgrade over generic bolts when you need a true bearing surface.