HOLO-KROME 720000210 براغي ذات رأس مقبس #4-40 × 7/16 بوصة | مقبس سداسي | فولاذ سبائكي معالج بأكسيد أسود حراري (100 / عبوة)

Used these to rebuild a small fixture at work and they seated perfectly every single time, no stripped heads or wobble on the hex driver. The thermal black oxide looks consistent across all 100 pieces, which is more than I can say for cheaper packs I've tried. Just the right size for #4-40 clearance

The socket drive on these #4-40 screws seats perfectly on my hex wrench, zero stripping or wobble during assembly. Used them to secure a jig plate and they've held tight through a week of vibration without backing off. The black oxide finish also picked up a nice even patina, which is a bonus for a

The black oxide finish on these screws gives them a nice, consistent look against the steel tools I'm using them with. Snug fit, no wobble at all in the jig I'm building. So far seems like a solid pack for the price.