BTC-5140 Screw size?

Good afternoon guys.

Sorry for my English.

I got to the keyboard without screws, BTC-5140, as already mentioned in the title, maybe you or your friends have a keyboard of the BTC-51xx series and they could measure the sizes of the screws … Thank you in advance and once again apologize for my English.

Welcome to the forums @nyji1 !

I dont even know what brand is that. What keyboard are you using exactly?

Also, have you tried contacting the manufacturers?

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