[Amps] Arco 30 Series Trimmer Cap Nuts

[Larry Benko]

12-24 is national fine I think and
12-40 is national extra fine and I have 2 sets with this tap and a die.

12-40 is definitely the correct thread for the Arco 30X trimmers

73,
Larry, W0QE


On 4/30/2017 10:35 PM, Jim Thomson wrote:
> Date: Sat, 29 Apr 2017 13:59:56 -0500
> From: "Jim W7RY" <jimw7ry at gmail.com>
> To: "AMPS" <amps at contesting.com>
> Subject: [Amps] Arco 30 Series Trimmer Cap Nuts
>
>
> <Does anyone know what type of nut is used on an Arco 30 Series ceramic
> <compression trimmer capacitor?
>
> None of the standard (SAE) or metric nuts at my local hardware store work.
>
> Reference picture here:
>
> https://www.rfparts.com/304m.html
>
> Anyone have some? Need about 15 of them.
>
> Thanks!
> 73
> Jim W7RY
>
> ##  $10.00 for a   12-40 nut is looney tunes.  You can buy the entire arco, brand new,
> for  $6.40
>
> ##  I have never heard of a 12-40 nut.   Not in any of my tap + die sets either.  None of my thread gauges
> have it either.  Only thing I have for a thread gauge, and tap + dies is a 12-24.
>
> ##  Phone arco and see if they will sell  you the nuts.  How did you manage to obtain a bunch of arco trimmer
> caps.... minus the mating nuts ??
>
> Jim  VE7RF
>
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