InMac-Kolstrand's Stainless Steel 1-1/2" NPT Single Thru-Deck Fitting can't be beat!
The 1-1/2" Single Thru-Deck plate measures 4" X 4" and the overall height of the Thru-Hull is 3".
These 1-1/2" NPT Single Thru-Decks are threaded on both ends with 1-1/2" NPT Pipe-threads (per American Standard Pipe Thread Taper).
InMac-Kolstrand makes 'Only the Best', and Kolstrands's All Stainless Steel Thru-Hull Fittings are the Best!
InMac-Kolstrand 1-1/2" Inch NPT Single Thru-Deck Fitting
InMac-Kolstrand Part No. AKTDF-24-NPT-1