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
LASCO 1-1/4-in x 1-1/2-in Schedule 40 PVC Reducing Male Adapter at Lowes.com
Adapter 1/2 NPT male to G1/4 male
Spindle Adapter to 1-1/4 in. x 8tpi at Penn State Industries
Brass, 1/2 in x 1/4 in Fitting Pipe Size, Reducing Adapter - 46M452|706120-0804 - Grainger