M5-0.8 x 10mm 內六角螺絲 | 平頭內六角驅動 | 全螺紋 | 12.9級合金鋼 熱處理黑氧化物 (900顆/包)

I was a bit worried about stripping these tiny screws, but the Class 12.9 alloy steel feels incredibly tough. They threaded perfectly into my jig without any binding.

The black oxide finish on these screws gives them a nice, consistent look, and the hex socket gripped perfectly with my driver. They fit snugly into the precision assembly I’m working on, and the 12.9 alloy steel feels rock-solid for the price.

The hex socket drive seated perfectly on my wrench, and the black oxide finish looks sharp on the jig I just built. Threads were clean and consistent across all 900 pieces, so I didn't have to chase a single one with a tap. Exactly what I needed for precision assemblies.