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Nut Nomenclature

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messydeer

Joined: 13 Feb 2006
Posts: 214
Location: Bellingham, WA

Posted: Wed Feb 20, 2008 5:04 pm Post subject: Nut Nomenclature

Hello!

 

Is there any difference between AN365-1032 and AN365-1032A? A new

number I think is MS20365-1032. Likewise AN365-428 and AN365-428A. I

just called Spruce and they said there was no difference, but then I

did a net search. Some RV builder had photos of a 428 and 428A. One was

about half the height of the other.



I looked at gahco's files and it didn't help much. Don't know of any

other place to search.



Cheers,

Dan

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mark(at)macomb.com
Guest

Posted: Wed Feb 20, 2008 8:46 pm Post subject: Nut Nomenclature

Dan,

Lay your hands on a copy of the book Standard Aircraft Hardware published

by Aero. This book will answer your question. I'm 1000 miles from my copy

otherwise I'd simply look it up and tell you.

Mark



 	  Quote: 	
		   



 Hello!



 Is there any difference between AN365-1032 and AN365-1032A? A new

 number I think is MS20365-1032. Likewise AN365-428 and AN365-428A. I

 just called Spruce and they said there was no difference, but then I

 did a net search. Some RV builder had photos of a 428 and 428A. One was

 about half the height of the other.



 I looked at gahco's files and it didn't help much. Don't know of any

 other place to search.



 Cheers,

 Dan





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=165301#165301

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AV8ORJWC

Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"

Posted: Wed Feb 20, 2008 10:33 pm Post subject: Nut Nomenclature

Since no one has speculated here and Kelly has not piped in.  I think

you will find that the MS20365 was an older bolt which is now commonly

replaced with the newer, improved standard AN365.  The "A" at the end of

the designator is likely to represent "No hole present for purposes of a

securing Cotter Pin or safety system".  Without the "A" is likely the

one that would actually have the hole and have the ability secure the

nut to the bolt.



John Cox



--

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Vanremog(at)aol.com
Guest

Posted: Wed Feb 20, 2008 11:26 pm Post subject: Nut Nomenclature

In a message dated 2/20/2008 10:35:35 P.M. Pacific Standard Time,  johnwcox(at)pacificnw.com writes:

  	  Quote: 	
		  Since no    one has speculated here and Kelly has not piped in.  I think

you will    find that the MS20365 was an older bolt which is now commonly

replaced with    the newer, improved standard AN365.  The "A" at the end of

the    designator is likely to represent "No hole present for purposes of    a

securing Cotter Pin or safety system".  Without the "A" is likely    the

one that would actually have the hole and have the ability secure    the

nut to the bolt.

	


 

 ======================================

  

 First of all, this item is a nut, not a bolt.  Suffixes mean different  things for different specs.  In this case it means a non-metallic locking  feature.

  

 I thought that everyone knew where to get this information since the tax  payer financed it long ago.  There is no need to speculate here.  This  stuff is well established.  Any MS, NAS and/or AN numbered military part  has a spec and any and all of these specs can be downloaded by number from http://www.assistdocs.com/search/search_basic.cfm

  

 Why guess, get the straight scoop yourself.

  

 N1GV (RV-6A, Flying 887hrs, O-360-A1A, C/S, Silicon  Valley) 



Delicious ideas to please the pickiest eaters. Watch the video on AOL Living.

  [quote][b]

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stevea(at)svpal.org
Guest

Posted: Thu Feb 21, 2008 9:36 am Post subject: Nut Nomenclature

Dan,



Spend $6 at Genuine Aircraft Hardware 

(http://www.gen-aircraft-hardware.com) for a good AN/MS/NAS hardware 

reference book.  It is a great cross reference between the AN, MS, and 

NAS part numbers.  Reference book pages are also viewable on the web 

site.  The Spruce catalog is OK, but usually does not cross reference AN 

to MS to NAS numbers.



Many of (most of?) the AN part numbers have been superseded by MS 

numbers, but everyone in the GA world still seems to use the AN numbers.

Here's what the hardware reference book says:

AN365-xxxA  translates to MS21044N(xx).  This is a standard cad plated 

steel nylock nut.  The "A" suffix sometimes (maybe most of the time) 

gets dropped off, probably because this is the nut used in most aircraft 

applications.  Van's drawings do not use the "A" suffix for the standard 

steel hardware call out.



There is also a AN365-xxxC, now called a MS 21045C.  This is a stainless 

steel version of the standard size nylock nut.



Perhaps the smaller nut you saw was really a AN364-xxxA or AN364-xxxC 

which translates into other MS numbers.  This is a low profile nylock 

nut (cad plated steel, or stainless).

Confused yet?  

good luck,

Steve A.

slowwwww build RV-6A

messydeer wrote:

 	  Quote: 	
		   



 Hello!

  

 Is there any difference between AN365-1032 and AN365-1032A? A new

 number I think is MS20365-1032. Likewise AN365-428 and AN365-428A. I

 just called Spruce and they said there was no difference, but then I

 did a net search. Some RV builder had photos of a 428 and 428A. One was

 about half the height of the other.



 I looked at gahco's files and it didn't help much. Don't know of any

 other place to search.



 Cheers,

 Dan

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maurv8(at)compuplus.net
Guest

Posted: Thu Feb 21, 2008 10:44 am Post subject: Nut Nomenclature

Dan,



Check out  East Coast Aviation Supplies.

Web site:  www.ecasinc.com

Good catalog which I use for reference and very competitive pricing also 

easy to do business with.

I have no interest in this company, financial or otherwise.

Mauri

RV-8

finishing forever

Polson, MT

---

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deanpichon(at)msn.com
Guest

Posted: Thu Feb 21, 2008 11:19 am Post subject: Nut Nomenclature

I just looked at the AN365 specification.

The "A" suffix indicates a "non-metallic insert".  According to the spec, An AN365-428 is a 1/4-28 nut "either all metal or with non-metallic insert".  Adding an "A" after the dash number forces a non-metallic insert.

 AN365 is marked "INACTIVE FOR NEW DESIGN AFTER 11 MARCH 1957.  USE STANDARD MS20365".

MS20365 has been superceded by MS21044

Specification MS21044 was cancelled 12 MAY 1999 and replaced by NASM21044.  This specification does, however, retain the MS part numbering system.

NASM21044 is an active specification.  This specification offers nuts in steel, aluminum, brass, and stainless.  All flavors come with non-metallic inserts.

 I hope this helps.

Regards,

 	  Quote: 	
		   Date: Thu, 21 Feb 2008 09:32:14 -0800

 From: stevea(at)svpal.org

 To: rv-list(at)matronics.com

 Subject: Re: Nut Nomenclature

 --> RV-List message posted by: steve <stevea(at)svpal.org>

 Dan,

 Spend $6 at Genuine Aircraft Hardware 

 (http://www.gen-aircraft-hardware.com) for a good AN/MS/NAS hardware 

 reference book. It is a great cross reference between the AN, MS, and 

 NAS part numbers. Reference book pages are also viewable on the web 

 site. The Spruce catalog is OK, but usually does not cross reference AN 

 to MS to NAS numbers.

 Many of (most of?) the AN part numbers have been superseded by MS 

 numbers, but everyone in the GA world still seems to use the AN numbers.

 Here's what the hardware reference book says:

 AN365-xxxA translates to MS21044N(xx). This is a standard cad plated 

 steel nylock nut. The "A" suffix sometimes (maybe most of the time) 

 gets dropped off, probably because this is the nut used in most aircraft 

 applications. Van's drawings do not use the "A" suffix for the standard 

 steel hardware call out.

 There is also a AN365-xxxC, now called a MS 21045C. This is a stainless 

 steel version of the standard size nylock nut.

 Perhaps the smaller nut you saw was really a AN364-xxxA or AN364-xxxC 

 which translates into other MS numbers. This is a low profile nylock 

 nut (cad plated steel, or stainless).

 Confused yet? 

 good luck,

 Steve A.

 slowwwww build RV-6A

 messydeer wrote:

 > --> RV-List message posted by: "messydeer" <messydeer(at)yahoo.com>

 >

 > Hello!

 > 

 > Is there any difference between AN365-1032 and AN365-1032A? A new

 > number I think is MS20365-1032. Likewise AN365-428 and AN365-428A. I

 > just called Spruce and they said there was no difference, but then I

 > did a net search. Some RV builder had photos of a 428 and 428A. One was

 > about half the height of the other.

 >

 > I looked at gahco's files and it didn't help much. Don't know of any

 > other place to search.

 &g========

Need to know the score, the latest news, or you need your Hotmail®-get your "fix". Check it out.  [quote][b]

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gyoung

Joined: 09 Jan 2006
Posts: 211
Location: Republic of Texas

Posted: Thu Feb 21, 2008 10:31 pm Post subject: Nut Nomenclature

Here are some special fasteners that aren't in the reference book.  They can be pretty handy and don't need approval for use on  experimentals.

 http://www.metricscrew-toolco.com/pg4.html

  

 Regards,

Greg Young

  

   [quote][b]

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