[ARC5] Screw lengths for receivers

[Kenneth G. Gordon]

On 28 Sep 2012 at 6:43, J. Forster wrote:

> I've seen 3/16" and 1/4" but have no idea what goes where.
> 
> Also some are plated brass, some (stainless?) steel. Some are also
> SEMS or KEPS and have integral lockashers.

I finally DID find a chart listing all the screws for the entire SCR-274N sets, 
but so far none for the AN/ARC-5 or ARA sets. 

There are quite a number of different 3-48 screw lengths and types, but it 
doesn't list where they go. I am sure some are used only in the transmitter 
and other places, and not the receiver.

I compared screw lengths from what appears to be an original receiver that 
had never been modified and found 4 different lengths (so far), all of which 
had lock-washers included, including those three short ones at the bottom 
front, although the lock-washers there were embedded in the paint and 
almost impossible to remove.

According to the SCR-274N manual, all the 3-48 binding head screws are 
brass, two sizes plated with cadmium, and the other several sizes plated with 
nickle or were black. There were two sizes that were EITHER cad or nickle 
plated.

As soon as I can get to my list, I'll post the information, in shortened form, 
here.

Kenneth G. Gordon W7EKB

"Courage is being scared to death but saddling up anyway."--- John   Wayne