Help needed, screws

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Hello,

I have a problem with some screw for mounting speakers.

The TAD 1601a i build into my A7 enclosures were delivered with some mounting kit, using 8 screw each speaker, dimensions are about 4,9mm diameter and ~40mm long each. There are about 32 turns on one inch.


Now the surrounding of the speakers membrane is only 3mm away from the baffle, i want to mount a distance ring here. Probleme is those screws are to short, i would need 16 screws about 50mm long for this.

As far as i found out those screws may be NF/UNF Nr. 10
Overe here only metrical screws are usual, i can´t find those here.

Anybody who could help?
 
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