The connector type Pin, Threaded refers to the connector type.In order to package the product, a Bulk case is used.It's best to use it when the temperature is below 125°C.In the packaging with the 0418, there is a device enclosed in the package.
D-621-0418 Features
D-621-0418 Applications
There are a lot of TE Connectivity Aerospace, Defense and Marine D-621-0418 Coaxial Connectors applications.