3/4" NPT Male x 1/2" NPT Male Straight 5404-12-08 Adapter | NPT Male to NPT Male - Hex Nipple | NPT to NPT | Hydraulic Adapters & Fittings | Hydraulics | www.surpluscenter.com
1/2 NPT to 3/4-16 Male Adapter
3400: 3/8″ Male NPT to 1/2″ Male Flare Adapter | Fittings, Inc.
1" NPT Male Pipe x 3/4" Garden Hose Male Adapter – FireHoseSupply.com
MettleAir 122-ED 3/4" NPT Male to 1/2" NPT Male Brass Pipe Hex Reducer/Reducing Nipple Fitting/Adapter (Pack of 10): Amazon.com: Industrial & Scientific
Everbilt 3/4 in. MHT x 1/2 in. FIP Brass Adapter Fitting 801729 - The Home Depot