A small drop of Loctite® 222, which is purple in color, would be appropriate 
for these small screws in this application. However, I don’t consider most cars 
to be a high vibration environment. If one were to regularly drive on 
cobblestone or washboard surfaces, then a thread locker might be warranted, but 
that would be more of a low frequency vibration, very unlike a high frequency 
vibration, such as might be generated by a high RPM 4 cylinder motorcycle 
engine.

Even though the screws may be of a stainless steel material, there is still a 
slight potential for galvanic corrosion. I’d think that use of a heavy bodied 
anti-seize compound on these screws would be all the “thread locker” most OM’s 
would need.

73 de Dennis KD7CAC
Scottsdale, AZ

> On Jun 18, 2015, at 5:59 AM, David Robertson <[email protected] 
> <mailto:[email protected]>> wrote:
> 
> One of the members of this e=mail forum made the following statment:
> 
> 
> "If the radio is going to be used in a high vibration environment, like a
> car, sealing the screws with Loctite might be a good idea."
> 
> Although he is correct, you must be very careful on which type of Locktite
> you use. Locktite comes in colors and you want to stay away from the red
> color Locktite as it is perment. Using it will make it very difficult, if
> not impossible to remove.
> 
> 73
> Dave KD1na
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