Microphone stand thread adapter, 3/8 to 5/8 inch
A threaded bushing that lets a European 3/8 inch microphone stand accept a US 5/8 inch 27 TPI clip or shock mount. The part has an external 5/8-27 thread about 12 mm long, an internal 3/8-16 thread through a 15 mm body and a 22 mm knurled flange for finger tightening. Printed threads work well at this pitch when modelled with 0.15 mm radial clearance and a small lead-in chamfer; printing the adapter standing on its flange keeps the thread profile clean and strong.
SpeakCAD models both threads to the exact standard and clearance you request, so you are not relying on a file drawn for a different printer's tolerances. Preview free in your browser, then ask for a 1/4 inch variant or a longer flange if the first fit is not to your liking.
Create a thread adapter bushing: external 5/8 inch 27 TPI thread 12 mm long with 0.15 mm clearance and a 0.5 mm lead-in chamfer, internal 3/8 inch 16 TPI thread through a 15 mm long body. Knurled flange 22 mm diameter, 4 mm thick between the two sections.