براغي M12-1.75 X 55mm رأس أسطواني | محرك سداسي داخلي رأس مسطح | خيط كامل | فولاذ سبائك فئة 12.9 أكسيد أسود حراري (50 / عبوة)

Fit perfectly on my milling machine’s fixturing plate—the black oxide coating seems durable and didn’t chip during installation. The hex socket drive allowed me to torque them evenly without stripping.

Used these to bolt down a new jig table in my shop, and the 12.9 alloy steel feels rock solid under tension. The black oxide finish has a nice matte look and hasn't shown any rust after a week of coolant splashes. Threads ran clean with a tap, no binding.

The black oxide finish on these held up without a single scratch during my jig assembly, and the 12.9 alloy steel feels rock solid in the hand. Torqued them to spec with no stripping on the hex socket, and all fifty threads were clean right out of the bag.