Ordered propellers for mini 3 pro yesterday (or so I thought), on my iPhone at work, having left my glasses at home.
Caught 2 Trains to Birmingham today to pick them up, 2 Trains home, tried to fit them, and realised the screws were different to the ones I’d taken off.
Whoops, I’d order mini 3 props, not pro.
Rather than get another 2 Trains to Birmingham, and 2 home, are these props the same, in which case I will reuse the original screws.
They ““look”” the same, but would like guidance from you more experienced guys.
There’s no difference between props for the Mini 3 and the Pro.
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Ordered mini 3 props from master Airscrew. Should have been pro. Inform they are same with different screw figment. Told ok to use old screws.
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No Amazon Prime where you live? 
Free same day delivery, £9 quid all in: https://www.amazon.co.uk/DJI-Mini-3-Pro-Propeller/dp/B09WW2V7JH/
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They use different screws, but as I understand it, the props are identical.
Mini 3 (left), Mini 3 Pro (right)
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Ahh interesting, I never knew the screws where different.
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Firstly, thanks for reassuring me the actual props are the same.
Secondly, WOW, what an amazing response time.
Thanks guys.
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If I were you, I would test them out with the drone hovering low over tall grass preferably. Always better to be safe than sorry. Once you are happy … send it 
Dji do recommend changing the screws every time you change a prop
That’s because they come coated on the threads with a lock-tight solution but to be honest just make sure they are tight (don’t give them welly though as they can snap)
Just check them regular once you fitted the new props
I’ve actually got some loctite screwlock and nutlock.
Would it be worth using a dab? Or d’ye think that would cause potential to damage either the male or female thread on removal if it proves too tight?
No don’t do it, it will at least attack the plastic on the props
It could drip into the motor and I think you would struggle to remove them again
Thanks again for quick response.
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Fyi, DJI use Loctite blue on the screws supplied with the spare props supplied with my Mini 2.
It is the tiniest amount, on just about 1.5mm of thread length
Be careful putting them on I kept shearing the bolts so I made a short fix vid
