Q: Can I use this plug to replace the mic plug on my David Clark H10-40?
Yes, you can use either this plug or our part # 11-03918.
Q: What's the item # of the corresponding jack for this plug?
A compatible jack for the .206 Inch Mic Plug would be part# 11-05995 (Microphone Jack, 3-Circuit JJ-033).
Q: Can I connect my 3.5mm jack to this product?
No, this does not accept 3.5 mm male.