براغي رأس مقبس M5-0.8 X 16mm | رأس زر مقبس سداسي | خيط كامل | فولاذ سبائكي درجة 12.9 أكسيد أسود حراري (600 / عبوة)

The black oxide finish on these is the real deal—gives them a consistent, dry look that makes me trust they'll hold up on the jigs. Threads cut clean and the hex socket seated snug on my driver the whole way in. Solid 600-count box, which means I'm set for a while.

Installing these into the tooling fixture for an upcoming production run went smooth as butter, socket drive engaged perfectly without any slipping. The black oxide finish seems durable and the fully threaded length gives great holding power.

Been using these for jig assembly on my CNC mill, and the black oxide finish holds up well against coolant splashes. The hex socket drive is clean and doesn't strip out with standard wrenches. A solid buy for anyone needing strong M5 hardware in bulk.