WHAT ARE CB RADIO STUD MOUNTS
The connector reliably carries signals at frequencies up to 100 MHz. The coupling shell has a 5⁄8 inch 24 tpi UNEF standard thread The most popular cable plug and corresponding chassis-mount socket carry the old Signal Corps nomenclatures PL-259 (plug) and SO-239 (socket). These are also known as Navy type 49190 and 49194 respectively
PL-259, SO-239, PL-258, and several other related military references refer to one specific mechanical design collectively known as the UHF Connector. In some countries, for example in Israel, the term 'PL connector' is confusingly associated rather with the analog phone connector. The designations come from the Joint Electronics Type Designation System, its predecessor AN system, and the earlier SCR (Set, Complete, Radio) system