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Kirkham Motorsports

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  #61 (permalink)  
Old 06-26-2018, 09:43 AM
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Note that the little two-pager I posted recommends NAS 6303 Series High Temperatuer Alloy Hex Bolts for your brake hat, coat, and walking stick.

"Identical in external configuration to the NAS 6203 series bolts listed above. Made from A286 stainless steel alloy, rated for 1200°F operation. Minimum tensile strength is 160,000 psi; minimum shear strength is 95,000 psi. The brake hat bolt of choice for all serious race cars."
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  #62 (permalink)  
Old 06-26-2018, 12:43 PM
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What I ordered was AN6-10A bolts. Five per hub on the front. They fit perfect!
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  #63 (permalink)  
Old 06-26-2018, 02:03 PM
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Quote:
Originally Posted by LMH View Post
What I ordered was AN6-10A bolts. Five per hub on the front. They fit perfect!
Larry
Unless you're driving like Morris, aircraft spec bolts will probably do you just fine. And you'd probably have smoke coming out of your wheel well before you could heat damage the AN bolts anyway. Personally, I pull her over when I see smoke, steam, etc. coming off her....
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  #64 (permalink)  
Old 06-26-2018, 02:15 PM
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Drive like Morris?!
Actually that’s what fits the holes in the hub. Wire wheel car. I’m not worried!
Larry
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  #65 (permalink)  
Old 06-26-2018, 02:22 PM
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Quote:
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Drive like Morris?!
Actually that’s what fits the holes in the hub. Wire wheel car. I’m not worried!
Larry
The way I drive you could probably rest your hand on the hat with no trouble -- I could get by with plastic zip ties instead of the hat bolts.
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  #66 (permalink)  
Old 06-26-2018, 05:53 PM
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Quote:
Originally Posted by patrickt View Post
Unless you're driving like Morris, ...
Are you saying I’m a terrible driver???
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  #67 (permalink)  
Old 06-27-2018, 02:09 PM
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FYI, per the manufacturer, genuine Aerotight steel nuts (non stainless) are grade 8 strength nuts.
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  #68 (permalink)  
Old 06-27-2018, 05:19 PM
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Anyone have a place to get Aerotight nuts that would have 7/16 20? I need some for the pins to the rear uprights. I made the pins with this thread on the ends.
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  #69 (permalink)  
Old 06-27-2018, 07:24 PM
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I bought nuts as well as other things from British Fasteners. https://britishfasteners.com/
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  #70 (permalink)  
Old 06-27-2018, 07:59 PM
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The standard MS21042L-7 (Cad plated) has been replaced by NASM21042 for Nut sizes of to -6
Larger -7 and up are covered under NAS1291-7 (Cad plated).
Available from pretty much any aviation supply house. Aviall, Duncan, etc....
http://www.coastfab.com/uploads/4/1/...291_rev_13.pdf
https://datasheetspdf.com/pdf-down/N...M21042-AIA.pdf

A safe vendor to by from: (safe meaning everything comes with FAA 8130-3 forms for traceability. No chance of getting Chinese counterfeit hardware)
NUT NAS1291-7


Mom and Pop hobby shops like Skygeek are sketchy on stocking levels.

Last edited by spdbrake; 06-27-2018 at 08:10 PM..
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  #71 (permalink)  
Old 06-27-2018, 09:27 PM
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So far I have not been able to find 7 /16 20 aerotite nuts. Does anyone know if they available in this size.
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  #72 (permalink)  
Old 06-27-2018, 09:38 PM
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I misunderstood the request. I thought you were looking for aircraft quality hardware.
Here is a link to the aerotite hardware. Fastenerdata - Aerotight Nut - Fastener Specifications

http://www.apexstainless.com/downloads

Last edited by spdbrake; 06-27-2018 at 10:09 PM..
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  #73 (permalink)  
Old 06-28-2018, 07:09 AM
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Aerotight fasteners were developed for the aircraft industry. Most fasteners used throughout Cobras were from the aircraft industry.
7/16 UNC/UNF are advertised here: https://www.fastenright.com/general-...ight-nuts/sl01

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  #74 (permalink)  
Old 06-28-2018, 07:43 AM
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Quote:
Originally Posted by LMH View Post
Aerotight fasteners were developed for the aircraft industry. Most fasteners used throughout Cobras were from the aircraft industry.
7/16 UNC/UNF are advertised here: https://www.fastenright.com/general-...ight-nuts/sl01

Larry
The original bolt/pins are 7/16 - 18 BSF and Aerotight nuts for those will be somewhat scarce.

Last edited by A-Snake; 06-28-2018 at 07:46 AM..
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  #75 (permalink)  
Old 06-28-2018, 08:01 AM
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Possibly in in the 1950s they were. If they had a Spec (MIL, NAS,MS, etc..) assigned to them they could be used in a Aerospace or Military application.
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  #76 (permalink)  
Old 06-28-2018, 08:08 AM
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Quote:
Originally Posted by A-Snake View Post
The original bolt/pins are 7/16 - 18 BSF and Aerotight nuts for those will be somewhat scarce.
Yeah, I know. I was posting for MAStuart for his car.
They are advertised here btw but I’ve never bought from them: https://www.arunfasteners.co.uk/stoc...-locking-nuts/

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  #77 (permalink)  
Old 06-28-2018, 08:35 AM
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Quote:
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Are you saying I’m a terrible driver???
Actually you're a damn good driver Morris. I remember you well from C Production days driving Datsun 280Z's.
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  #78 (permalink)  
Old 06-28-2018, 08:41 AM
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Quote:
Originally Posted by SwiftDB4 View Post
Actually you're a damn good driver Morris. I remember you well from C Production days driving Datsun 280Z's.
Uhhhh, I dunno about that. I saw an interview a couple of weeks ago with the "wives of NASCAR drivers" and each one of them said that they did the family vacation driving themselves because their husbands could not pay attention to the road consistently when only driving 60mph.
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  #79 (permalink)  
Old 06-28-2018, 06:08 PM
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Quote:
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Actually you're a damn good driver Morris. I remember you well from C Production days driving Datsun 280Z's.
Did I race with you in the early days....??

Thanks for the nice words...I was obsessed in my younger days.....now I’m much more mellow and slower in my new life.....but I still build things to the best of my ability....and am trying to share as much knowledge as I can to help others.....
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Old 06-29-2018, 08:19 AM
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I was usually a backmarker, but I did finish second to your first in the 1981 June Sprints. I did several IMSA races with Jack Buchinger in 280Z's. You might remember him.
Dave Miller
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