? Screw head diameter?

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? -
Mike

"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

On Mon, 1 Jan 2007 09:47:48 -0500, "Morgans"
wrote:



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.


No, no, no, no

We do not use hardware from Home Depot Aerospace for anything except
non-structural things like holding the floorboards in place.

I mentioned HD and the cml screw because I thought the cml screw would
have the same profile as the MS screw and I could use it as a model of
what to purchase. What I didn't realize is that the underside angle of
the head (countersink) for the MS screw was different from the cml
screw, so that was a good idea gone bad.

Still don't know if a #6 MS24694 is going to give me a 3/8" dia head.

On Mon, 01 Jan 2007 11:06:27 -0500, Michael Horowitz
wrote:

On Mon, 1 Jan 2007 09:47:48 -0500, "Morgans"
wrote:

I mentioned HD and the cml screw because I thought the cml screw would
have the same profile as the MS screw and I could use it as a model of
what to purchase. What I didn't realize is that the underside angle of
the head (countersink) for the MS screw was different from the cml
screw, so that was a good idea gone bad.

Still don't know if a #6 MS24694 is going to give me a 3/8" dia head.

Head diameter, 0.3765 to 0.3813. Google is your friend,
http://www.hi-shear.com/standards/hst13.pdf

There are several head angles common, 82, 90, 100, and 118 which I've
used in various applications for various reasons.

"Morgans" wrote in message
news

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.

Doggone it, Morgan! Only six hours and forty-seven minutes into the new year
and you've already done it!

We've told you before, it's LOSER. Looser pertains to the state of your
bowels. :}

Rich S.

"Rich S." wrote in message
. ..
"Morgans" wrote in message
news

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.

Doggone it, Morgan! Only six hours and forty-seven minutes into the new
year and you've already done it!

We've told you before, it's LOSER. Looser pertains to the state of your
bowels. :}

CRAP ! ! ! g

The thing of it is, is that I nowe beter then that! ;-)
--
Jim in NC

"Morgans" wrote in message
...

CRAP ! ! ! g

The thing of it is, is that I nowe beter then that! ;-)

That's ok. Hppy New yere anway. I fogot the rule that any post correcting
speling has to contain at least too errors.

Ricih S.

"Rich S." wrote in message
. ..
"Morgans" wrote in message
...

CRAP ! ! ! g

The thing of it is, is that I nowe beter then that! ;-)

That's ok. Hppy New yere anway. I fogot the rule that any post correcting
speling has to contain at least too errors.

Ricih S.

Foregiveden.

Happy New Year to you, too, and may the number of takeoffs you log equal the
number of landings you log.
--
Jim in NC

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?

"jls" wrote

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?

I would have to believe that they do not meet specifications for repairing a
certified aircraft.

I might trust them for holding skin down, but not much more than that. No,
I take that back. I don't trust them that far.

Have you seen the quality of the hardware nuts and bolts and screws, lately?
Chinese steel is of such low quality, I would be surprised if it was 25% the
strength of a part to MilSpec part comparison.

No, I would not bet my life on the saving of a few bucks by using unknown
hardware screws. If I'm that short of cash, I will go fly model airplanes,
or something.
--
Jim in NC