AN833-6D Drill size

[AcezHi]

I am installing a flop tube in my left tank and I would like to know what size the hole is for an AN833-6D fitting.

Thanks

 

[terrye]

AN833-6D

AN833-6D has a 9/16-18 thread. A 9/16" diameter hole is probably sufficient.

 

[AcezHi]

I wasn't sure if it was a little smaller since my 9/16 step drill wouldn't quite fit in the hole in the prepunched access plate I am replacing.

 

[Wayne Gillispie]

Like Terry said 9/16" or .5625"

Van's pre-punched holes on my large area washers are just a .001 or .002" smaller.