This aluminum adapter converts the very common 1/4" thread found on camera tri-pods and mono-pods to the 5/8" 11-TPI (threads per inch) found on high-end surveying antennas and equipment. It's ideal for mounting RTK surveying antennas onto a monopod and tripod. https://elecena.pl/product/17299585/antenna-thread-adapter-1-4in-to-5-8in 2020-11-21 https://elecena.pl/product/17299585/antenna-thread-adapter-1-4in-to-5-8in 2022-02-22 https://elecena.pl/product/17299585/antenna-thread-adapter-1-4in-to-5-8in 2025-04-12 https://elecena.pl/product/17299585/antenna-thread-adapter-1-4in-to-5-8in 2025-04-14