HOLO-KROME 72358 7/8-9 X 5-1/2" براغي رأس اسطوانية | محرك سداسي | سبيكة فولاذ بأكسيد أسود حراري (10 / عبوة)

I needed a longer socket cap screw for a jig rebuild and these 7/8-9 x 5-1/2" ones threaded in smooth and held tight. The hex drive seated perfectly without stripping.

The black oxide finish on these is flawless and they threaded into my fixture with zero binding. I've torqued them down hard on a jig and the socket drive hasn't rounded out at all.

We’re rebuilding a fixture table at the shop and these alloy steel caps threaded in smooth as butter, no galling on the first pass. The thermal black oxide held up to the cutting oil without streaking, and the hex socket seated perfectly with a standard Allen wrench. Exactly the right length for our