PARKER Reducing Adapter: Brass, 3/4 in x 1/2 in Fitting Pipe Size, Female NPT x Male NPT, Adapter - 20YZ80|12-8 RA-B - Grainger
LTWFITTING 1/2 in. FIP x 1/2 in. MIP Brass Pipe Adapter Fitting (5-Pack) HF1028805
7/16 Hex to 1/2 Square Socket Adapter Drive Converter Spring Ball Retainer 2" | eBay
2" to 1-1/4" Hitch Adapter
LASCO 2-in x 1-1/2-in dia Adapter Adapter PVC Fitting in the PVC Pipe & Fittings department at Lowes.com
1/2" x 3/4" Sch 40 PVC Reducing Female Adapter - Soc x Fipt 435-074
Rockler Dust Port Adapter, 1-1/4'' Vacuum Wand to 2-1/4'' Port | Rockler Woodworking and Hardware
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