براغي ذات رأس أسطواني 7/8-9 × 6-1/2 بوصة | محرك سداسي مجوف | ملولبة جزئياً | سبيكة فولاذية مؤكسدة حرارياً باللون الأسود (10/عبوة)

The black oxide finish on these screws held up perfectly when I clamped them into my milling vise—no scratches or galling. They threaded smoothly into tapped holes for a jig rebuild I’ve been putting off. Exactly the length and thread pitch I needed for that deep fixture.

I needed a longer bolt for a jig I was building, and these 6-1/2" cap screws fit perfectly into the tapped holes. The black oxide finish feels durable and hasn't shown any signs of wear after a few assembly cycles.

The hex socket drive gave me a solid grip when tightening these into a jig I'm building, and the black oxide finish looks clean and professional. I used three of them for a heavy-duty fixture, and they seated perfectly without any stripping. Exactly what I needed for precise assembly work.