براغي ماكينة #4-40 × 1/2 بوصة | رأس دائري مشقوق | فولاذ مطلي بالزنك (400 / عبوة)

I needed exactly 400 of these for a panel assembly project, and every single screw threaded cleanly into the #4-40 nuts without any binding. The slotted drive heads let me use a standard screwdriver, which saved me from digging out my hex bits.

The zinc plating is holding up nicely on these, and the slotted heads let me seat them flush without stripping. For the price, a 400-pack for this size is a solid deal if you go through these on enclosures regularly.

I needed a small bag of these for a project and the 400-count box is honestly way more than I’d ever use, but the price is right. The slotted drive holds the screwdriver tip well without slipping, which helps when you're dealing with tight spots.