براغي ماكينة 5/16-18 X 4" | رأس مسطح بشق مشقوق | فولاذ مقاوم للصدأ 18/8 (100 / عبوة)

I was worried about finding slotted screws this size locally, but these fit perfectly into my old machinery’s existing holes. The 304 stainless steel finish feels solid and I’ve got enough for a dozen projects.

The flat heads sit flush and clean on my deck rebuild, and the 18/8 stainless seems heavy-duty so far. I’ve been using them in a damp garage with no rust forming, and the coarse threads bite solidly into the wood.

Pulled these out of the pack for a saltwater dock gate and the 18/8 stainless is already holding up better than the old galvanized hardware. The slotted drive seated flush without stripping, even with a wrench snugging the 4-inch length into a thick support.