Ancable Replacement 10-Pack TRS Male Plug 3 Pole 1/8" 3.5mm Solder Type DIY Audio Cable Connector for Repair Headphones Headset

If I want to prevent audio coming through tab speakers, will putting one of these in trick the tablet into thinking it's sending signal to headphones?

What is the threading on the pvc screw-in?

I need 3.5 plug with bare wire for speakers on the other. Would leaving the ground unattached to anything affect its functionality?

I want these to go with a jack (female). nine to nine 3.5mm stereo jack panel mount connectors are not deep enough. what can i use?