M6-1 X 25mm 內六角螺絲 | 內六角驅動 | 全牙 | 12.9 級合金鋼熱處理黑化 (600 顆/包)

I needed a bulk lot of M6 cap screws for a jig build, and the uniform threading on these made assembly much faster than with mixed batches. The black oxide finish has a nice, even texture that shouldn't gum up my wrench.

I needed strong screws for a jig I’m building, and these M6-1 x 25mm cap screws feel solid in hand with that thermal black oxide coating. The hex socket drive seats perfectly in my Allen key, and the fully threaded length gives plenty of grip. Exactly what I wanted for precision work.

The hex socket drive grips perfectly without stripping, even when torquing these 12.9 alloy screws into a steel fixture. I’ve used about 50 so far and the black oxide finish is holding up nicely with no rust.