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Repair and disassembly information for Samsung's flagship S21 Ultra Android smartphone, released in January of 2021.

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Size of screws for Samsung Galaxy S21 Ultra 5G, SM-G998B?

Hi,

While using the self repair kit, I managed to misplace some of the screws. Does anyone know what the size are, or where to buy, replace screws for the Samsung Galaxy S21 Ultra 5G, SM-G998B?

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I'm pretty sure there are different types of screws to screw in different parts maybe if you could give me a bit more detail on which part requires the screws I might be able to help.

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Samsung screws are all the same size

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1 Answer

On S21 ultra, the regular screw used in most part called "screw 3427" and the small one for the charging board and some other parts called "screw 3428". They are all philips type of screw.

There are also screw that secure the antenna to the side of the phone which I don't know the name. It's like philips screw but only have 3 notch rather than four.

Reference: https://youtu.be/N4q65A9ZpK0

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Yes the screws you need for coil pack motherboard charging unit are 2.5mm and 3.0mm and are Philips head type and you can get them from aliexpress you'll find it on Google play store. But the screws I'm looking for are for the samsung galaxy s21 arieal antenna flex are Y type screws and are really small and I haven't found them yet so good luck

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