Proline Series 3/4-in x 1/2-in Threaded Female Hose x Mip Adapter Fitting in the Brass Fittings department at Lowes.com
M14 Female To 1/2 Inch 1/4 Inch M10*1 Male Pressure Gauge Fittings,m20 Female To 1/2 Inch 1/4 Inch Male Pressure Gauge Adapter - Pipe Fittings - AliExpress
2-PC. 3/4" Drive x 1/2" Drive Impact Socket Adapter - AP2416RB | Mac Tools
1/2 x 20 Double Male Adapter / Air Arms S510 / Hatsan Jet 1 & Jet 2 Ad – DonnyFL
Amazon.com: NPT 1/2 Female Thread to 1/2 Inch Male Thread Pipe Fitting Converter Adapter Solid Brass 2 Pack : Everything Else