The correct matching parts are a WECO 358A Plug to a WECO 477B Socket. The comment(s) about Trompeter Plugs is absolutely correct. I’m not sure if there is different part which is a direct equivalent for 358A
I have to check adapters called up in HP3586B Manual(s).
From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] Sent: Friday, October 13, 2017 10:28 PM To: hp_agilent_equipment@... Subject: Re: [hp_agilent_equipment] Re: Just purchased HP 3586B--EBAY
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HP specifically states on their spec sheet for the 3586 that the 75 ohm port mates with the WECO 358A plug.