[Fot] Bolts and Threads

[Duncan Charlton]

One other source for AN hardware I’ve used many times is Wicksaircraft.com <http://wicksaircraft.com/>.

Nyloc nuts are available in half-heights and there are many other items available — roll pins, close-tolerance bolts, Tinnerman nuts, Dzus fastener hardware, castellated nuts to use with drilled bolts, etc.

Duncan Charlton
Elgin, Texas USA



> On Nov 24, 2016, at 2:02 PM, Ashley Page <apage at prosystembrakes.com> wrote:
> 
> If you want a good bolt that you don't have to ever worry about then go here:
> http://www.coastfab.com <http://www.coastfab.com/>
> The AN or NAS bolts are used in the aviation industry, each one is inspected and top quality. The best feature is that the shank (portion under the head that is not threaded) is available in any length in increments of .063" (1/16"). You never have the threads in shear. The AN washers are available in .063" and .032" thickness and there are nyloc nuts and mechanical lock nuts. 
> They are more expensive but no better quality available. You can buy 1 bolt or quantity. 
> The web site explains in detail. Good folks to deal with.
> 
> 
> Sent from my iPad
> 
> On Nov 24, 2016, at 11:03 AM, Bud R <levilevi at comcast.net <mailto:levilevi at comcast.net>> wrote:
> 
>> The Collective,
>> 
>> I’m working on the Spitfire’s traverse leaf swing spring rear suspension and can’t find locally the 7/16”  fine thread (20 tpi) by 3 1/2” bolts that were holding the vertical link and to the trunnions and to the swing spring bushings.
>> 
>> I can find the right sizes in a coarse thread (12 tpi) grade 8 bolt and thats my plan. The old ones are grade 5 or in one case a bolt with no slash marks on top. I don’t know what it is.
>>  
>> Do these bolts need to be fine thread for any particular reason, e.g. for safety, torque specs, etc.? Is a grade 8 bolt a good idea where it will be stressed with all the up and down motion with the vertical link? Too brittle? Usually I go for grade 8 whenever possible but I’ve heard there are instances where it might not be the best solution.
>> 
>> An aside for Thanksgiving: 
>> My son and his wife teaching in Shanghai said the Chinese love to celebrate American holidays (they know them from American TV and movies) but their take on Thanksgiving is that you thank people who do nice things for you. So they got cards from their students thanking them for teaching. Kind of a different twist but a good one I thought.
>> 
>> Happy Thanksgiving to all.
>> 
>> Thanks,
>> Bud Rolofson
>> 
>> Extreme Parts Racing (more than just a haircut)
>> 
>> 71TR6 CC57365 (Good 6)
>> 71 Spitfire MK IV Race Car #3
>> 69 Spitfire MK 3 (back up FE engine/dinghy car)
>> 93 Minnie Winnie Race Support Vehicle 
>> 77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
>> 
>> 
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>> 
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