Everbilt 3/8 in. Compression x 1/2 in. MIP Brass Adapter Fitting (2-Pack) 800769 - The Home Depot
K&M 21980 Thread Adapter - 3/8 inch Female to M10 x 12mm Male | Sweetwater
Forney 75533 Brass Fitting, Reducer Adapter, 3/8-Inch Male NPT to 1/4-Inch Male NPT - Air Tool Fittings - Amazon.com
Manfrotto 120DF Female 3/8" to Female 3/8" Adapter Plate 120DF
K&M 217 Microphone Thread Adapter - 3/8 Inch Female to 5/8 Inch Male | Location Sound
CRAFTSMAN 1/2-in to 3/8-in Standard Socket Adapter in the Socket Adapters department at Lowes.com
VFAUOSIT Brass Pipe Fitting, Water Hose Adapter, 3/8 inch Male x 1/2 inch Female water pipe adapter 3/8 to 1/2 pipe adapter Reducer Adapter 2 Pieces - - Amazon.com
Ideal Vacuum | Adapter 3/8 inch hose barb to 1/4 inch ID Male NPT, Stainless Steel, Vacuum Fittings Adapter, Swagelok, SS-6-HC-1-4
Medium Duty Male adapter 3/8 inch x 1/4 inch Misting System Parts