Morgans wrote:
"Michael Horowitz" wrote in message
...
MS24593 is a flat head machine screw with a 6-32 shank/thread. In this
application the diameter of the screwhead is important.

I went to HD and bought a 6-32 machine screw to see what length I
needed (the original having rusted beyond recognition). I compared the
HD screw with the MS and noticed it was 1/4" dia. as compared to 3/8",
so I'm wondering if I order the MS screw if the head will be large
enough.

The difference I'm seeing is caused by the 100^ angle on the MS screw,
but I don't know if the final diameter will match the original.

Would anyone with experience with the MS24593 screw please weigh in? -

I would be very curious as to what the application is for this screw.

If it is going to be any more important than holding a radio in the panel,
then you need to be thinking about the quality and strength of the screw.

HD screws have no strength guarantee, compared to a MS screw. They may have
only 10% of the strength of a MS screw. If that is the case, the head size
is the least of your worries.

I hope you are not using hardware store screws in your homebuilt for any
important functions. You are gambling your life. You could be a _big_
looser.
--
Jim in NC

A big looser? What is he going to loose? A goose?

Anyway, what he's doing is restoration and the screws he's using
probably hold on a leading edge of aluminum sheet or attach ribs to a
spar. That's why they rust beyong recognition. If they were on a
Taylorcraft wing or aileron, for instance, they were off-the-shelf
screws. So using them would in all likelihood not make him any
"looser."

Anyway I doubt if the PK screws used in such a case are (or were) the
same Air Force-Navy quality you find in an AN bolt or nut.

I have removed some of those screws from an old certified airframe and
the heads break all to hell.

I know an A&P who bought all his screws for the rib-to-spar fasteners
and LE on a J-3 at the local hardware store. Does that mean he's loose
as a goose? Or looser?