OmniSwivel Adapter: 3/8-Inch F = 9/16-Inch M | Dive Gear Express®
1/4 Inch Male To 3/8 Inch Female Tripod Screw Adapter 3/8 To 1/4 Tripod Adapter Mount Screws, Accessories For Camera/tripod/mono - Auxiliary Devices - AliExpress
CRAFTSMAN 3/8-in to 1/2-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
Brass Screw Adapter 3/8"-16 Female to 1/4"-20 Male For Tripod Thread Reducer | eBay
Parker Expander Adapter 3/8 x 3/8 inch NPT - Brass - FG-B-3/8
Windtech M-16 Microphone Thread Adapter - 3/8 Inch-16 Female to 5/8 Inch-27 Male | Location Sound
3/8" Male NPTF X 1/2" Male NPTF Reducing Adapter | MB Sturgis
On-Stage MA-100 5/8 inch Female to 3/8 inch Male Microphone Thread Adapter | Sweetwater