A PL-259 UHF Female Plug to UHF Female Socket RF Coaxial Adapter Connector is a component that seems to have a mixed and sometimes confusing naming convention in the RF world. Based on standard terminology, a PL-259 is a UHF male plug, while an SO-239 is the corresponding UHF female socket. The name you provided is a combination of these two, which is often used in the market to describe a barrel adapter.

Description and Function

This adapter is a female-to-female barrel connector designed to connect two coaxial cables, both of which have a male (PL-259) UHF connector at their ends. It is essentially a “gender changer” that acts as a simple, direct extension to join two cables.

• UHF Female: This describes the connector on both ends of the adapter. It has an outer threaded barrel and a central pin receptacle (socket). The standard designation for this is SO-239.
• PL-259: This is technically the name for the male plug, not the female socket. When you see “PL-259 UHF Female” in a product description, it’s a shorthand or an incorrect term used by sellers to mean a UHF female connector that mates with a PL-259 male connector.
• Double Female: The adapter has a female connector on both ends, so it can connect two male-ended cables.
• RF Coaxial Adapter: This confirms its purpose is for use with radio frequency coaxial cables, typically in amateur radio (ham radio), CB radio, and marine VHF applications.