Amazon.com: KOOTANS 1/2 NPT x 1/2 NPT Male Solid Brass Hex Nipples, Heavy Brass Pipe Adapter Fittings Equal Nipples Connectors 4Pieces : Industrial & Scientific
1/2 Inch Drive x 1 Inch Impact Socket Reducer Adapter Socket Female to Male | eBay
Grofry 1/4 inch NPT Male to 1/2 inch NPT Female Brass Pipe Fitting Reducer Adapter - Walmart.com
Impact Socket Adapter Set, 3 Piece
Amazon.com: GESHATEN 1/2” G Thread (BSP) Female to 1/2” NPT Male Connector, Brass BSP to NPT Adapter 1/2 Inch, Industrial Metal Brass G Thread to Pipe Fittings Connect (2 Pack) : Industrial & Scientific
Parker - Industrial Pipe Adapter: 1/2" Female Thread, 1/2" Male Thread, MNPTF x FBSPP - 60041951 - MSC Industrial Supply