[ARC5] 3-48 binding head sizes in SCR-274N

[J. Forster]

IMO, the only ones with sigificant demand are the top and bottom cover
screws for Tx's and Rx's.

Brass is easy to blacken. SS not so much.

Ni plating is also easy. Cd has toxicity issues and is hard to get done.

The #3-48 Pan Head, brass, slotted are available at roughly $30/100. I've
not seen the SEMS with integral lockwashers, but have not looked.

FWIW,

-John

============




> B=black, C=cadmium plated, N=nickle plated.
>
> 1/8" N
> 5/32" B
> 3/16" both C and N
> 7/32" B
> 1/4" both C and N
> 9/32" B
> 7/16" N
> 15/32" B
> 17/32" B
>
> There are others 2-56, 4-40, and several others, but the above are all the
> 3-48 sizes used in
> the SCR-274N.
>
> I wish we could find a similar list for the ARA (probably the same as for
> the '274N) and for the
> AN/ARC-5 (possibly simplified or reduced numbers).
>
> I also talked with our local Fastenal outlet. Getting 3-48s is not trivial
> now. I am going down to
> talk with them this morning sometime.
>
> I bought a couple of hundred of at least two sizes of 3-48 several years
> ago, but all in
> stainless steel as, at the time, those were far less expensive than brass.
>
> More later.
>
> Ken W7EKB
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