Every mic-stand thread, finally sorted

If you run audio and camera gear out of the same kit, you hit the thread-standard wall constantly. A US 5/8"-27 mic clip won't sit on a European 3/8" boom, and neither one threads onto a 1/4"-20 camera arm or magic arm. I got tired of losing a session to a brass adapter that had walked off, so this set covers all six cross-combinations in one download.

Each adapter is a female socket on one end and a male stud on the other, with a knurled band in the middle sized to hand-tighten. They print standing up, no supports, no hardware — drop them on the plate and go.

The six adapters

• 5/8" F → 3/8" M — put a US mic clip on a European boom.
• 3/8" F → 5/8" M — the reverse: EU stand to US clip.
• 5/8" F → 1/4" M — mic clip onto a camera or light stand.
• 1/4" F → 5/8" M — a 1/4"-20 accessory onto a mic stand.
• 3/8" F → 1/4" M — boom arm to a 1/4"-20 fitting.
• 1/4" F → 3/8" M — a 1/4"-20 accessory onto a 3/8" thread.

Naming is F<female>-M<male>: the socket takes the male of that size, the stud threads into a female of its size.

The three standards it bridges

• 5/8"-27 UNS — US microphone stands, clips, shockmounts.
• 3/8"-16 — EU mic stands, boom arms, light stands.
• 1/4"-20 UNC — cameras, tripods, accessory and magic arms.

Printing

• No supports. The threads and knurl spiral around the vertical build axis and the socket ceiling closes itself with a 45° cone — anything the slicer flags is a false positive.
• Orientation: exactly as the file sits — socket mouth flat on the bed, male stud pointing up. Don't re-orient.
• 0.20 mm layers is fine; drop to 0.16 mm for crisper threads on the fine 5/8"-27. 4 walls, 40% infill — 100% is fine too, the parts are only 2–6 cm³. A 3–5 mm brim holds the thin socket-end first layer down.
• PLA is crisp and fine for indoor work and light mics; go PETG for anything load-bearing or a hot venue — it won't creep under sustained load or soften in a hot car.
• Each part is about 15–40 min and 2–7 g of filament.

One tip on fit

The threads are cut for a calibrated printer running PLA onto metal hardware. Thread fit is printer-dependent, so print one adapter and try it on your actual gear before you run all six — a printer that comes out a little tight or loose will show it on the first part, and it's easier to sort out there than across the whole set.

Photos are shot on real studio mic stands, so you can see each adapter on actual 5/8" and 3/8" hardware. Original clean-room geometry; threads modeled from the published imperial thread standards. Licensed CC BY-NC.