براغي رأس أسطوانية M2.5-0.45 X 8mm | محرك سداسي داخلي | كاملة الخيوط | درجة 12.9 من سبائك الصلب مطلي بالزنك (600/عبوة)

Used these on a precision fixture I'm building and the hex socket drive seated perfectly every time, no stripped heads. The 12.9 alloy steel feels seriously solid for such a tiny screw, and the zinc finish is uniform across all 600.

The hex socket drive on these screws fits my precision driver bits perfectly, with no wobble. I used them to secure a jig for a small CNC project, and the zinc plating seems like it will resist rust well. For the price per piece, the quality is hard to beat.

These are exactly the right size and grip for my 3D printer's hotend assembly, and the 12.9-grade steel feels rock solid. No stripped heads or wobble so far after a dozen installations.