About Screw Fitment Database
Screw Fitment Database is published by DixonAppStudio LLC. It exists for one job: you have a tiny screw in your hand, or a hole with no screw in it, and you need to know exactly what goes there before you order anything.
Why we built it
Screw sizes are scattered across service manuals, forum posts and parts listings that only quote part numbers. Losing one M2 × 3 mm screw can stall a repair for a week. We pulled the documented sizes into one place, kept the sources attached, and added free tools so you can work the size out yourself when nobody has published it.
Every fitment page shows where the number came from. If a source is thin, the page says so rather than sounding more certain than the evidence.
Where the data comes from
- Manufacturer service manuals and disassembly guides (Dell, HP, Lenovo, ASUS, Acer, MSI, Framework, Valve and others)
- Published engineering drawings and hardware datasheets from component makers
- Standards documents: ISO, DIN, ANSI and JIS thread and head-size tables
- OEM spare-part catalogues that state a thread size, not only a part number
- Repair guides and teardowns where the screw size is stated explicitly, not guessed
How an entry gets published
- A fitment is only published when a source states the thread size in writing. Nothing is inferred from a photo.
- Part numbers, driver types and 'M-something' sensor bodies are not accepted as thread evidence.
- Length is listed only when the source gives it; otherwise the entry says the length varies by position.
- Anything with model-to-model variation carries a caution note telling you to measure the original first.
- Entries are removed or corrected when a better source contradicts them.
Found something wrong?
Corrections are welcome and we would rather fix an entry than defend it. Email support@dixonappstudio.com with the device or screw size, what you measured, and a link or photo if you have one. Suggestions for devices to add are just as welcome.
How the site pays for itself
Some product links are affiliate links, including Amazon and eBay. If you buy through one, we may earn a small commission at no extra cost to you. Buying links never change what the data says — a screw size is a measurement, not an opinion, and no seller can pay to be listed as the correct fit.
Safety note
Use this site as a starting point, not a guarantee. Manufacturers change hardware mid-run. Measure the original screw whenever you still have it, and never fit a screw longer than the one that came out — a half millimetre is enough to punch through a board or a battery.