NO FLAMES HERE!
Here is what I have for choices:
Not the average Home Depot / Lowes "Stuff"
A286 Super Alloy—With approximately 26% nickel and 15% chrome, this
iron-based super alloy brings you the strength of alloy steel with
corrosion resistance similar to 18-8 stainless steel. It meets ASTM A453
Grade 660 and is not magnetic. Screws have a minimum Rockwell hardness
of C31 and minimum tensile strength of 140,000 psi.
17-4 PH Stainless Steel Alloy—Combines the high strength of alloy steel
with the corrosion resistance of stainless steel. It meets ASTM F593
Grade 630 and is magnetic. Screws have a minimum Rockwell hardness of
C31 and minimum tensile strength of 140,000 psi.
Alloy 20 Stainless Steel—Also known as Carpenter 20 screws. With
excellent resistance to sulfuric acid, these screws have a minimum
tensile strength of 80,000 psi.
I also have a choice of 18-8 or 316 SS Nylon lock nuts.
Tom W1ALZ
On 5/7/2014 4:13 PM, Mike Ryan wrote:
My 2 more cents....
I have used one or two stainless steel bolts in the past when short a
bolt. However, my recollection was that stainless steel is not as
strong as the bolts supplied with the tower and/or recommended. You
might want to be careful with these types of substitutions, (for
example the ss bolts and nylon nuts)...what grade/quality of
stainless? They sound good but..? Ok, now open to flames .... - Mike
-----Original Message----- From: Tom Nicholson
Sent: Wednesday, May 07, 2014 3:46 PM
To: Mark Pride ; Mike Ryan ; towertalk@contesting.com
Subject: Re: [TowerTalk] ROHN TOWER BOLTS
Just my 2 pennies here, but I'm going to be using SS hardware but I'll
be using SS Nyloc Nuts. Also if using SS, be sure to use never seize
compound, if you don't, the nuts will almost for sure seize up if you
try to remove at a latter date. Lesson "hard learned" with SS bumper
bolts on my Hot Rod!!!
Tom W1ALZ
On 5/7/2014 9:50 AM, Mark Pride via TowerTalk wrote:
Heard a story many years ago about a tower that was installed in KH6
with stainless steel hardware and after time, with the constant trade
winds, the nuts all fell off.
There is vibration to contend with in certain places around the world.
Regards,
Mark, K1RX
On Wednesday, May 7, 2014 9:44 AM, Mark Pride via TowerTalk
<towertalk@contesting.com> wrote:
One other point on the tower hardware from Rohn these days. They have
changed their hardware where the nuts are designed to be put on the
bolt ONE time. To remove the nut, one will damage the thread of the
bolt (sorry - forgot the description of this design - lock nut?).
Guess the concept is, you put up a tower one time and never take it
down! However to their point, it prevents nuts from backing off (good
thing).
Regarding the new hardware you find in the tower leg of the new
material - you might want to change it. The current nut design has 3
indentations on the surface - pretty easy to spot. Bolts are fine,
just need to change the nuts.
Regards,
Mark, K1RX
On Wednesday, May 7, 2014 7:43 AM, Mike Ryan
<mryan001@tampabay.rr.com> wrote:
Larry is correct in that both the 25 and 45 use different size bolts
and if
my memory serves me, this would be 4 different sizes in the case of
these
two tower types. I have never seen washers used with these. It is
noteworthy, that should you be putting tower sections up, to be
ABSOLUTELY
sure that the legs are clear inside. Run a garden hose through the
leg to be
sure there is no blockage, or even push a ground rod through each one
for
example. I can't tell you how many times I have found blockage in the
legs...dirt, mud, bugs, etc. And while on the subject, occasionally
found
that the blockage was TOWER BOLTS that were packed in the legs by the
manufacturer which had never been found/removed. -Mike
-----Original Message-----
From: Larry
Sent: Wednesday, May 07, 2014 5:47 AM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] ROHN TOWER BOLTS
25G and 45G use two different sizes at each joint on each leg. I
forget what
size they are offhand. DX Engineering sells leg bolts and their web
site may
tell you what the sizes are or the perhaps the Rohn web site.
73, Larry W6NWS
-----Original Message-----
From: Cal Zethmayr
Sent: Wednesday, May 07, 2014 12:02 AM
To: towertalk@contesting.com
Subject: [TowerTalk] ROHN TOWER BOLTS
There is quite a debate at one of our local Saturday morning breakfasts
gabfests about Rohn Tower Bolts.
Some say that Rohn uses two different size bolt sets for each tower
section.
Some say that Rohn uses only one size bolt-washer-nut sets for all
towers.
So what are the facts?
Are there different size bolt sets for Rohn towers, and are they
different
depending on the tower ? 25G, 45G and 55G?
Cal Z
W4GMH in Crestview, FL.
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