M5-0.8 x 16mm 內六角螺絲 | 六角驅動 | 全牙 | 12.9級合金鋼 熱處理黑色氧化 (600顆/包)

The hex socket drive on these M5s is cut cleanly, so my Allen key seats without any wobble, and the 12.9 alloy steel feels properly tough for jig work. All 600 pieces arrived evenly coated and threading smoothly into my tapped holes—no stripped corners or gritty resistance. I’ve already burned throu

The black oxide finish held up fine during assembly, and the hex socket drive seated cleanly in my driver without any wobble. These are solid for jig work, though at 600 per pack you’ll have spares for years.

Installed these on a custom fixture and the black oxide finish held up nicely against minor scuffs during assembly. The 12.9 grade steel gives them a reassuring heft compared to cheaper bolts I've used.