براغي رأس مقبس M16-2 × 50 مم | محرك سداسي | كامل الخيوط | فئة 8.8 سبائك فولاذية مؤكسدة سوداء حرارياً (25/عبوة)

These are the exact spec I needed for a jig rebuild, and the hex socket drive made installation into tight spots much easier. The black oxide finish on the alloy steel looks durable and should hold up well in my fixture.

Put these on a tooling fixture that sees constant adjustment, and the hex socket drive hasn't stripped once. The black oxide finish also took the shop grime without any rust showing.

I used these in a jig setup for a milling machine, and the 8.8 alloy steel held up perfectly under high torque without any issues. The hex socket drive made installation straightforward even in tight spots, which saved me a lot of time.