Fuel tank - Petcock

Mini Bike & Go-Kart Parts

#1
Sorry if wrong place to post. Thinking it's a technician question.

Just a simple question to the experts out there.... It will help me and maybe some others: Do you put anything on the petcock threads when screwing it into tank? It's for a 1970 Fox gas tank

Appreciate the advice.
Thanks in advance
 

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