How to open/refurbish HP 1250-1091 BNC connectors

[ingowien]

Hi,
does somebody know how to open these HP BNC connectors correctly? Some connectors on my HP 8673B are in bad condition and should be replaced or at least cleaned. Some time ago I tried to open similar BNCs on a 8593E and all I managed was to ruin the knurls but the nuts didn't move. They seem to be either tightned very strong or are stuck or glued.
- Is there a correct way or trick to open these nuts (warm air, WD-40, special tools or just brute force)?
- Is there a way to refurbish the connectors? Do you know how they are plated and how to clean them? These are only low bandwidth aux connectors but they shouldn't be in such bad shape.
- Does someone have replacement connectors?
best regards
Ingo

[Neomys Sapiens]

Can't say about those specific HP jacks, but I am using small interdental brushes and Kontakt Gold2000 to clean BNC jacks. In case of more dirt/oxidation I have a small, slightly conical diamond burnisher which is a repurposed pre-used (so not to bite too much) dental rotary insert.