Select a Product Part NumberMaterialSeatThreadThread Size GMBPlated SteelCopperNPT1/4" (6mm) GMBAPlated SteelPolymerBSP1/4" (6mm) GM3APlated SteelPolymerBSP1/2" (15mm) GMCPlated SteelCopperNPT3/8" (9.5mm) GM38APlated IronPolymerBSP3" (75mm) GM28APlated IronPolymerBSP2" (50mm) GM18Plated IronPolymerNPT1-1/4" (32mm) GM33Plated IronPolymerNPT2-1/2" (65mm) GM13Plated SteelPolymerNPT1" (25mm) GM3Plated SteelPolymerNPT1/2" (15mm) GM8Plated SteelPolymerNPT3/4" (20mm) GM18APlated IronPolymerBSP1-1/4" (32mm) GM23Plated IronPolymerNPT1-1/2" (40mm) GM28Plated IronPolymerNPT2" (50mm) GM33APlated IronPolymerBSP2-1/2" (65mm) GM13APlated SteelPolymerBSP1" (25mm) GM23APlated IronPolymerBSP1-1/2" (40mm) GM38Plated IronPolymerNPT3" (75mm)