The D38999/26WF11PN is a military-grade circular connector specified by the MIL-DTL-38999 standard. It is configured as a self-locking, RFI grounding plug (shell type 26) with an aluminum shell and a Class W finish of olive drab cadmium over an electroless nickel base. This connector features a shell size of F, an '11' insert arrangement, and is populated with pin contacts with normal (N) polarization. Designed for high-reliability, these connectors are used in demanding military and aerospace applications requiring robust and secure interconnections.