HOLO-KROME 72362 براغي ذات رأس مقبس 7/8-9 × 6-1/2 بوصة | محرك مقبس سداسي | سبائك فولاذية مؤكسدة حرارياً باللون الأسود (10/عبوة)

Threads are clean and the 7/8-9 fit my jig perfectly, no galling when I torqued them down. The thermal black oxide held up fine under a bit of coolant, which is exactly what I needed for the tooling setup.

The black oxide finish on these screws looks really clean and holds up well in my jig setup. The hex drive fits like a glove and made tightening them into my machinery a smooth process.

I was a bit nervous about the thread size, but these 7/8-9 screws threaded smoothly into my machinery fixture. The black oxide finish looks clean and seems like it'll hold up well to oil and grime in the shop.