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Screwing Through Floor Panel

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Member - Posts: 1
Member spacespace
Joined: October 05, 2014
Location: Alberta, Canada
Posted: October 26, 2014 at 7:56 PM / IP Logged  
I'm an installer of 2-way radios and other communication solutions. The company I work for usually installs clamshells onto the floor-board with self-tapping screws such as these:
Hex Head Screws
I have two questions:
1. What type of screws do you use?
2. What type of visual check do you do before drilling?
I'd appreciate any input or suggestions.
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: March 09, 2015 at 2:24 PM / IP Logged  
That screw is known as a "taptight" here in the UK. I use the same with panhead (flanged head) Philips/Pozidrive.
Look underneath for pipes, wiring under the vehicle.
ici upfitter 
Member - Posts: 5
Member spacespace
Joined: March 13, 2015
Location: Mississippi, United States
Posted: March 13, 2015 at 9:40 PM / IP Logged  
Not much to add to what howie ii said, other than be absolutely sure of what you are drilling the screw into both inside the vehicle as well as any place under the vehicle that you may penetrate such as lines and gas tanks ect. Use only the depth screw necessary to penetrate carpet, padding and then the metal you are trying to get to. The best course of action is to try not to pick a location where the screw will pull free from the metal because it is too thin if at all possible. If you are not certain of a location, just find an alternate mounting location you feel safe with.
"It's just!"
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: March 14, 2015 at 4:40 AM / IP Logged  
Back in the days of under seat auto changers and amps, I found that Velcro was indispensable. And no vehicle damage!
Member - Posts: 4
Member spacespace
Joined: July 22, 2017
Location: Florida, United States
Posted: July 29, 2018 at 7:45 AM / IP Logged  
I'm wondering why you wouldn't rather epoxy pieces of thin fiberboard between the floor and carpet and drill into that?

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