See my other reply. Say you are using a grade dh carbon steel nut, they are up
at 175k, a standard grade 8 nut is 150k. That is above the A286. Like I said,
just be careful
--
73 de KG2V
Charlie
> On May 7, 2014, at 4:41 PM, Tom Nicholson <Gunsrus1942@Comcast.net> wrote:
>
> 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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