Thru Hull Question

kordo

I was reading an article by Steve D'Antonio the other day where he stated that a lot of thru hulls that he encounters use nps and npt threaded components.  I am wondering if anyone has taken the genset thru hull (as shown) apart and can tell me if the threads are compatible or not.  This is for a genset on a 2011 360.  Thanks.

Handymans342

Nps and npt thread are the same

kordo

Are you sure?  I think they stand for straight and tapered.  When mixed together, you apparently only get a few threads holding them together.  See link below.  Thanks. 

 https://www.passagemaker.com/technical/seacocks

Handymans342

You are correct but there are more than a few threads holding with the tapered threads

PickleRick

Brass is soft. It allows for some flex.  

An engineers by the book method and real life method sometimes don't mesh.  

kordo

OK, but would you agree that tapered should be used with tapered and straight should be used with straight.  My original question still stands, does anyone know if the threads shown in the pic (for a genset seacock on a Rinker) are straight, tapered or mixed?  Thanks.

aero3113

Looks nice and clean down there @kordo 😎

Handymans342

Tapered