M12-1.75×16mm 內六角螺絲 | 平頭六角驅動 | 全牙 | 10.9級合金鋼 熱處理黑色氧化 (100顆/包)

I needed some high-strength bolts for a jig I was building, and these class 10.9 screws fit perfectly. The black oxide finish gives them a nice, uniform look too.

I used these to bolt down a fixture plate on my mill and the hex socket drive seated perfectly every time, no stripped heads. For 100 pieces at this grade, the black oxide finish looks factory-fresh and they threaded cleanly into tapped holes without any binding.

The thermal black oxide finish on these looks and feels premium, and the hex socket drive makes them easy to torque down without stripping. The threads are perfectly clean and fully formed on every one of the 100 I popped open, so they're ready for jig work right out of the bag.