Re: 90 degree heater hose fitting problems

Posted by Dave Harrison On 2012/3/11 13:59:28

I just measured a 3/8'' NPT pipe fitting and get 16.23 mm dia at the same place you are measuring.

as JW quotes Pipe thread size is not the same as U.S. bolt size, it actually measures larger than the fractional size indicates.

Regards,
Dave.