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Posted by HeatPro on December 22, 2006 at 09:28:56:
In Reply to: Tap size for radiator Air Vent posted by george on December 22, 2006 at 07:09:43:
: What is the tap size for the smaller
: hole in the radiator for the standard
: small air vent?
NPT Size 1/8 - 27
Tap Drill Size (in.) "Q"
(Decimal) (in.) (0.332)
http://www.governaleindustries.com/Literature/literature3-05.pdf