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

[Kenneth G. Gordon]

On 28 Sep 2012 at 10:29, J. Forster wrote:

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

For the receivers, the top and bottom cover screws are in three different sizes and types: 
some are black, some are nickle, and some are cad-plated.

> Brass is easy to blacken. SS not so much.

As I said, I use flat-black model airplane paint.

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

Yes. I was aware of the last. As far as I am concerned, the SS does just fine for both Ni and 
Cd.

Besides, it appears that SS is quite a bit stronger than brass.
 
> 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.

>From what I have so far found, none of those used in the receivers had integral lock-washers 
or were SEMS. Those in which the lock washers were difficult to remove had simply been 
either tightened so tightly that they were a bit "mashed" or were embedded in the paint.

Thanks, John.

Ken W7EKB