Hey guys, sorry if this subject has been brought up in the past. Search engine is not working well for me. I am getting a 15" IB being built for me and want to mount it properly. I am going the T-nut route but do not know what size screws to get? 1/4in enough for 3/8? I dont even know what size the holes are in the sub frame.

 

thanks for your help!

Ralph

Just go slightly smaller than the holes.

I would if I had the sub in front of me trying to do one stop shopping so I can work on the car all day instead of driving to stores. 

I didn't use tnuts on mine as I don't care for them digging into MDF, all to often they fall out. I used a 1/4" steel ring that I threaded and cut to the same size as the outside lip of the sub. screwed that to the back side of the baffle and used machine screws to secure it.