براغي ذاتية الحفر (TEK) مقاس #14 × 4 بوصة | رأس غسالة سداسية | فولاذ مطلي بالزنك (100/عبوة)

Bought these for attaching metal brackets to steel beams, and the self-drilling tip saved me from pre-drilling every hole. The zinc plating held up fine outdoors so far, and the #14 size bites into thick metal without stripping.

These hex washer heads really help distribute the clamping force evenly on my metal roofing panels, and the zinc coating has held up well in damp weather. They drill in smoothly without stripping, which is a nice change from cheaper screws. Honestly, they’re exactly what I needed for a sturdy build.

I was drilling through some thick steel brackets and these #14 self-drilling TEK screws cut through without any pilot hole—saved me so much time. The hex head gave my driver a solid grip even when I really leaned into it. Zinc finish seems decent so far, no rust after a few days in damp weather.