I say it is a type HN connector.

See https://www.pasternack.com/hn-female-standard-slotted-contact-terminal-connector-pe44718-p.aspx

Tom
N3AJA


On 2/20/2025 11:39 AM, Konrad Werzner wrote:
Anyone able to help ID this connector? It is keyed and appears to be of MS style. Also looks to be RF. Tried a PL-259 and that didn't fit.



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