براغي رأس مقبس M20-2.5 × 55 مم | رأس مسطح محرك سداسي | كاملة الخيوط | فئة 12.9 سبيكة فولاذ مطلية بالزنك (25/عبوة)

The hex drive on these socket cap screws fits my hex key perfectly with no slipping—a nice change from lesser grades. Used them to secure a heavy jig in my shop and they haven't budged. The zinc plating gives good corrosion resistance for the price.

Finally, a proper 12.9-grade bolt that doesn’t strip when I torque it down on my jig—the zinc plating also hasn’t chipped after a week of clamping. These M20s fit perfectly in my precision assembly, and the flat head sits flush without any fiddling.

Used these to rebuild a jig at work, and the 12.9 alloy steel held up perfectly under heavy torque. The hex socket drive made installation quick with no stripping, even in tight spots.