Nine camera and desk mounting parts built to the actual standards, not eyeballed.

Included

Cold shoe mount, 1/4-20 base — built to ISO 518:2006 dimensions (12.5mm rail gap, 18.6mm depth, 2.0mm foot)Shoe mount adapter (the male half) with 1/4-20 on topNATO safety rail — 21mm wide, 45° dovetail, in 70mm and 50mm low-profile (6mm) plus 70mm standard (10mm). Slotted mounting holes.Arca-type quick release plate, 60mm, 38mm dovetailVESA 100 and VESA 75 to 1/4"-20 adapter plates — turns any monitor arm into a camera or light armFastener test coupon: all six thread/insert interfaces on one small print

Threads are steel, not plastic. Every 1/4-20 and 3/8-16 interface uses a captive hex-nut pocket — drop a standard nut in during the print. Printed plastic threads strip; these don't. Heat-set insert variants included for FDM.

A note on Arca: there is no published Arca standard. Real plates measure 38.1–39.6mm depending on brand. This plate is 38.0mm nominal; check it against your clamp.

STEP files for every part. Source script included — change a length, regenerate.