HOLO-KROME 72226 1/2-13 X 1" 內六角螺絲 | 內六角驅動 | 合金鋼熱處理黑色氧化 (50 / 包)

Installed these in a custom jig I’m building, and the hex socket drive made tightening them in tight spaces much easier than a standard hex head. The alloy steel feels solid, and the black oxide coating cleaned up nicely with just a rag.

The black oxide finish on these screws is way more durable than the plain steel ones I've used before. They threaded cleanly into my fixture plate without any binding.

I needed a batch of black oxide socket cap screws for a jig I'm building, and these 1/2-13 x 1" ones fit perfectly and look great. The hex socket drive grabbed securely without any stripping, and the thermal black oxide finish seems tough. They feel solid and well machined—exactly what I was hoping