GROCO Bronze NPS to NPT Flange Adapter 1-1/2". Specifications for GROCO 1-1/2" Bronze NPS to NPT Flange Adapter: Manufacturer: GROCO Color: Black Features of GROCO 1-1/2" Bronze NPS to NPT Flange Adapter Eliminate dangerous thread miss-match when in-line valves are screwed onto thru hulls Accept standard thru-hulls into the base and standard in-line valves on top Provide a safe and sturdy assembly when in-line valves are used as seacocks For OEMs prevent valve damage during engine or generator installation - the valve can be installed later Simplifies future valve replacement C83600 Bronze and #316 SS models Package Contents: GROCO 1-1/2" Bronze NPS to NPT Flange Adapter GROCO IBVF-1500: Bronze NPS to NPT Flange Adapter 1-1/2"