2-4-1/2 X 4-1/2" 內六角螺絲 | 六角驅動 | 全螺紋 | 合金鋼熱處理黑氧化物

The hex socket drive on these screws made installation quick and easy with my Allen wrench. They feel solid and well-made, perfect for securing the jig I built. Exactly what I needed for precision assembly work.

The black oxide finish on these screws is a nice touch—they slide into tapped holes without galling, which is exactly what you want for precision assemblies. I’ve used about thirty of them on a tooling fixture so far and the hex socket drive grips perfectly with no stripping.

The threads cut clean and the black oxide finish is consistent across every screw, no rough spots. I used them for a jig build and they seated perfectly with a hex key, zero stripping. Exactly what I needed for precision assemblies.