براغي رأس أسطوانية M20-2.5 X 65mm بمقبس سداسي | رأس مسطح محرك مقبس سداسي | ملولبة بالكامل | فئة 12.9 سبائك فولاذ أكسيد أسود حراري (25/عبوة)

I used these for a jig fixture and they threaded in smoothly without any binding. The 12.9 grade alloy steel feels noticeably tougher than standard bolts which gives me confidence in the assembly.

The black oxide finish on these M20 screws is a nice touch—they look proper in a jig and the 12.9 alloy steel feels rock solid when torqued down. Fully threaded means I didn't have to chase extra length, and all 25 in the pack came out clean, no burrs on the threads. For tooling builds, these are ex

The hex socket drive seated perfectly with my Allen key, no stripping or wobble even under decent torque. Threads ran smooth all the way through my jig plate, and the 12.9 alloy steel feels genuinely beefy for the size. Exactly what I needed for a heavy machinery fixture.