Many times, I just partially insert the connector in the socket and try to remove the spanner nut by hand- works about half the time, otherwise fabricating a spanner from a piece of scrap metal take about 5 minutes on a bench grinder.  I did finally buy an adjustable spanner.  Many English connectors require the use of spanner wrenches for assembly/disassembly.  Would these be referred to as “spanner-spanners” in the UK?😉

Regards,

Scott V. Johnson W7SVJ

From: [email protected] <[email protected]> On Behalf Of Steve Williams via ARC5
Sent: Friday, May 15, 2026 1:46 PM
To: Michael Hanz <[email protected]>
Cc: ARC5 <[email protected]>; List Milsurplus <[email protected]>; Military Radio Collectors Association ([email protected]) <[email protected]>
Subject: Re: [ARC5] SCR-522 Connectors

The square notches are for a spanner wrench. If you have one, plug it into a mating socket, clamp it in a vice, then carefully use what ever pliers you have to back out the notched ring mentioned above. On connectors that are this old, a little releasing liquid can't hurt, along with some gentle tapping around the edges. Patients and gentleness is the key.

Steve

KC4WN

On Fri, May 15, 2026, 2:19 PM Michael Hanz via ARC5 <[email protected]> wrote:

Well, you are supposed to use a spanner wrench, but only nuts like me
buy them (from my engine building days, mostly).

You could also use a screw driver and tap gently on the handle end with
the driver end planted in one of the four gaps.  You should cushion it
with a gum wrapper or similar.  It shouldn't take much to break it loose.

- Mike

On 5/15/2026 1:03 PM, Mark K3MSB wrote:
> Yup… I see it now…. page 20 and 21.    Also in the Table of
> Contents…..   Duh…..
>
> I have two of them apart.    I tried using pliers but the grip wasn’t
> good enough.  I thought about using a vice but that leads to obvious
> dangers…..
>
> Thanks Mike.
>
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