براغي ذاتية الحفر (TEK) #8 × 1-3/4" | رأس مسطح فيليبس | فولاذ مطلي بالزنك (1000/عبوة)

I used about two dozen of these to fasten steel sheeting to a frame and the self-drilling tip cut through cleanly without needing to pre-drill. The zinc plating seems decent and none of them snapped during installation.

The flat head sits flush with the metal surface, and the zinc coating seems solid. I used about 80 of them on a steel shed project and didn't have a single one snap or strip. These are exactly what I needed for drilling into 14-gauge steel.

These self-drilling screws went through 16-gauge steel like butter without needing to pre-drill, which saved me a ton of time on my metal shed project. The Phillips drive held the bit firmly without camming out, even driving them into studs.