I didn’t expect a box of screws to make such a difference in my DIY life, but here we are. A few weeks back, I hit a wall with my 3D printer projects. I’d designed a few enclosures and little functional parts, but I kept running into the same problem: how to hold everything together without messing with inserts, glue, or other “make-do” fixes.
That’s when I decided to try this 600pcs M3 Screw Assortment Kit. Honestly, I grabbed it because it was cheap (about eight bucks), had all the sizes I thought I’d ever need, and came in one neat, organized box.
Why I Bought It
I was tired of fiddling with heat-set inserts. They’re great for some builds, but they add extra steps, extra tools, and sometimes just don’t hold up for lightweight parts. What I needed was a straightforward, no-drama way to bolt my pieces together and take them apart when needed. A solid M3 kit checked all those boxes.
When It Proved Itself
The first project I used these screws for was a custom bracket to hold a Raspberry Pi and a cooling fan inside a 3D-printed case. Normally, I’d overcomplicate it with inserts or even superglue (which I always regret later). This time, I just drilled simple through-holes and used the screws with washers and nuts from the kit.
To my surprise, it felt professional. The parts were snug, easy to assemble, and best of all, easy to disassemble when I realized I had to flip the fan around. No melting plastic, no stripped threads — just undo, flip, and tighten again.
Since then, I’ve been using them everywhere: small joints on enclosures, hinge points on test pieces, even holding together a 3D-printed jig I made for clamping. Having all eight sizes in one box means I’m never scrambling for “just the right length.”
One Thing to Be Aware Of
If I had to nitpick, the only downside is the case itself. It’s decent, but not exactly “military-grade” — the little compartments can get mixed up if you shake it around too much. I ended up labeling the sections with tape just to make grabbing the right size quicker. Not a dealbreaker, just something to keep in mind.
Final Thoughts
For $7.99, this kit has been one of the most practical little upgrades I’ve made to my workspace. If you tinker with 3D prints, electronics, or any small DIY projects, having a ready-to-go assortment of M3 screws, nuts, and washers is a game-changer.
I didn’t realize how much time and frustration I was wasting until I had the right hardware at hand. If you’re tired of makeshift fasteners or want to keep your projects clean and reusable, I can’t recommend this enough.
👉 Check it out here: 600pcs M3 Screw Assortment Kit on Amazon