The 1-1634817-0: It is an accessory — not a connector body — used to secure the coupling nut on a BNC or TNC plug or jack against vibration loosening. The silver finish is standard for RF hardware where corrosion resistance and a consistent ground path are needed.
Lifecycle Status — Obsolete, Sourced to Order
For new designs, a functionally equivalent nickel-steel BNC lockwasher from the same or another manufacturer should be selected based on the thread form and panel thickness.
This lockwasher is intended for use with BNC and TNC connectors — it fits between the connector body and the panel, under the coupling nut. The nickel-plated steel body provides the spring tension needed to prevent the nut from backing off under cable flex or thermal cycling. It is not a BNC connector itself; it is the hardware that keeps the connector tight on the panel.