BrassCraft 1/4-in x 1/4-in Threaded Female Adapter Coupling Fitting in the Brass Fittings department at Lowes.com
Painter's Pole Threaded Coupling Sets - Max-Gain Systems
FangKingNo 10pcs 1" male thread to 1/2" female thread Reducer Bushing PVC Pipe Fittings Male to Female Thread Adaptor Coupling for connecting pipe White (1''x1/2'', 10) - Amazon.com
Coupling (female thread x male thread) STAINLESS STEEL 316 - Stainless steel threaded fittings, couplings - Stainless steel threaded fittings - Pipe systems, supply - Total product range | Wholesale Van Walraven
FPT Threaded PVC Coupler | Pond Installation | The Pond Guy