[GreenKeys] ST-6 routine maintenance

[John, W9DDD]

A Keps nut, (also called a k-lock nut or washer nut), is a nut with an 
attached, free-spinning star lock washer.

Picture here:
https://en.wikipedia.org/wiki/Keps_nut

John, W9DDD

On 5/30/2020 11:58 AM, Duncan Brown wrote:
> There is some sort of flexible washer over the ST-6 toroids and I was 
> careful not to tighten the screws to much.
> 
> Ralph's idea of a self-locking nut is a good one.
> 
> I think "Kepts nut"  was another name and must be derived from the 
> manufacturer of these lock nuts
> 
> Have fun,
> 
> Duncan
> 
> 
> On 30-May-20 12:33, Scott Johnson wrote:
>>
>> Technical term is “elastic stop nut”, (if you are looking for them in 
>> a catalog or online) Colloquially known as “nylocs” (trade name)
>>
>> Scott V. Johnson W7SVJ
>>
>> 5111 E. Sharon Dr.
>>
>> Scottsdale, AZ 85254-3636
>>
>> H (602) 953-5779
>>
>> C (480) 550-2358
>>
>> scottjohnson1 at cox.net <mailto:scottjohnson1 at cox.net>
>>
>> scott.johnson at ieee.org <mailto:scott.johnson at ieee.org>
>>
>> *From:* greenkeys-bounces at mailman.qth.net 
>> <greenkeys-bounces at mailman.qth.net> *On Behalf Of *Roy Morgan
>> *Sent:* Saturday, May 30, 2020 9:30 AM
>> *To:* Ralph Irish <w8roi at wowway.com>
>> *Cc:* Green Keys <greenkeys at mailman.qth.net>
>> *Subject:* Re: [GreenKeys] ST-6 routine maintenance
>>
>> As I remember it, what you refer to is a "self-locking" nut. It has a 
>> usually-nylon washer shaped insert on one end, the inside diameter of 
>> which ensures that the nut stays in place once installed.
>>
>> I remember some that had a fiber-phenolic locking part. Further, some 
>> such nuts are made entirely of metal, the locking part is likely 
>> threaded also but has segments that are bent inwards and create 
>> considerable friction against the screw or bolt.
>>
>> An "acorn" nut is closed on one end and likely creates no locking 
>> action. They create a finished appearance and may usually have been 
>> chromed. The BC-779 used them to fasten the cover to the panel.
>>
>> Roy Morgan
>>
>> K1LKY Western Mass
>>
>>
>>
>>     On May 30, 2020, at 11:43 AM, Ralph Irish <w8roi at wowway.com
>>     <mailto:w8roi at wowway.com>> wrote:
>>
>>     
>>
>>     *And, if there is an occasion to remove any boards with toroids,
>>     consider replacing the hex nuts and lock*
>>
>>     *washers with acorn nuts, or whatever those nuts are called with
>>     the plastic or fiber "snubber" ...*
>>
>>
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