Review on 🔩 StarTech.com FANSCREW: High-Quality 0.4 in Screws for Case Fan Mounting - Pack of 50 by Sean Purnomo

That's about what you'd expect from them. They are of reasonable quality and while not very sturdy, for the price and quantity they really shouldn't be. They fit a lot of purposes and they fit all of my PC fan mounts etc. They are a bit longer than I expected at about 3/8 inch. This bothered me a bit at first because sometimes these things are very difficult to screw into a new case and fan, but I know that sometimes when you have more cases or fans the extra length will be more than welcome. In this case, too long is better than too short. For the price, quality and quantity, I can recommend them without hesitation.