براغي رأس أسطواني بمقبس سداسي M2.5-0.45 X 5mm | رأس مسطح بمقبس سداسي | سن كامل | فولاذ سبائكي فئة 12.9 أكسيد أسود حراري (600/عبوة)

The black oxide finish held up perfectly while I torqued them into a fixture plate—no galling whatsoever. For 600 pieces at this price, the consistent thread quality was a pleasant surprise. Definitely my new go-to for precision assemblies.

Installed a batch of these in a small CNC fixture yesterday, and the hex socket engagement felt crisp and positive every time. The 12.9 alloy steel is noticeably harder than the 8.8-grade fasteners I used before.

The black oxide finish on these M2.5 screws gives them a nice, consistent look on my jig assembly, and the hex socket drive lets me torque them down without stripping. For the price, getting 600 pieces of class 12.9 alloy steel is a solid deal.