FNSID by Dixon Valve | FloMAX Diesel Fuel Swivel | 1-1/2" Female NPT x 1-1/2" Female NPT | DoubleConstruction: Stainless steel male threaded base. Stainless steel ball bearings. Black anodized female threaded nut. Fluorosilicone sealing O rings. Part Number Description Thread Size Cross Over Part Numbers Wiggins FastFill FNS Standard 1 1 2" Male NPT x 1 1 2" Female NPT ZS9 S150 FNS2 Standard 2" Male NPT x 1 1 2" Female NPT FNSID Double 1 1 2" Female NPT x 1 1 2" Female NPT FN600S* Standard 1 1 2" Male NPS x 1 1 2" Female NPT * Used with FN600 or