Amazon.com: C CLINK 1/2" NPT Solid Brass Drain Plugs commonly Used in Boat Hulls. 2 Pack Solid Brass Boat Hull Spare Garboard Drain Plug : Sports & Outdoors
ChillWaves Brass Pipe Fitting, Hex Nipple 1" NPT Male x 1" NPT Male Thread Adapter(2-PACK) - - Amazon.com
Winmien Brass Reducer Hex Bushing NPT Male to NPT Female Threaded Pipe Fitting Tube Adapter Convert. (1/2 NPT Male to 1/8 NPT Female,5 packs) - - Amazon.com
Brass Pipe Fitting,3/8 Inch NPT Male to 1/2 Inch NPT Female Brass Pipe Hose Tube Fitting Hex Head Bushing Adapter Convert(5, 3/8 NPT male x 1/2 NPT female) - - Amazon.com