Alan,
By raised countersunk, I think that in today's terms that would mean Oval
Head, and likely Phillips. There are several types of thread that might
come on a #10 screw. The number is like a guage or thickness. You can
easily get a #4, 6, 8, 10, 12 in a variety of machine threads for use with a
nut, like your standard 4-40, 6-32, 8-32, 8-24, 10-32, 10-24, etc. Once you
get above a #14 you are into 1/4"-20 threads per inch territory.
You can get sheet metal screws or wood screw in those same shank sizes of 4,
6, 8, 10, etc. but the threads are different and wood screws have tapered
shanks. Sheet metal screws are not tapered, so the gauge of the shank is
the same the whole length of the screw, except maybe at the very tip.
Any decent Ace or True value will have a selection of Sharon fasteners with
chrome plated oval head sheet metal screws in a variety of sizes and
lengths, and some may have stainless. Don't waste your time at Home Depot
or Lowes, they stopped carrying a good selection of fasteners about 2 years
ago.
Cheers,
Chris
BJ8
-----Original Message-----
Subject: [Healeys] Fasteners - Specifications.
Hey gang.
I have an arcane fastener question that I am struggling with.
The screws used to retain the aluminium cockpit trim rails are listed as
RPP0312's. The decode of this identifies them as Raised Countersunk screws,
Chrome plated with pointed tips. No.10 thread and 3/4" long.
That's good so far - but what is a No.10 screw thread, or a No.6 (02) for
that matter?
Many thanks.........
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(______ \____1957-BN4 ___/ _______)
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