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Bolts with AFC X marking on them??

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jindoguy(at)gmail.com
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Posted: Fri Dec 14, 2007 8:02 am Post subject: Bolts with AFC X marking on them??

They're AN bolts. The "X" means they're grade 6.



Go to: http://www.chiefaircraft.com/airsec/Aircraft/Hardware/Bolts.html 



click on undrilled and look at the picture.



Rick



On Dec 13, 2007 8:04 PM, grantr <grant_richardson25(at)yahoo.com (grant_richardson25(at)yahoo.com)> wrote: 

[quote]--> Kolb-List message posted by: "grantr" < grant_richardson25(at)yahoo.com (grant_richardson25(at)yahoo.com)>



What kind of bolt has AFC and a X on the head?



Thats the only marking on various sized bolts.





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Dana

Joined: 13 Dec 2007
Posts: 1047
Location: Connecticut, USA

Posted: Fri Dec 14, 2007 10:05 am Post subject: Bolts with AFC X marking on them??

AN bolts are not grade 6, though they may be roughly comparable in strength to SAE grade 6 (a class which was discontinued years ago).



 The "X" means it's an AN bolt, non corrosion resistant (as opposed to a dash for a stainless bolt or a double dash for an aluminum bolt).  The spec allows the manufacturer to add their own head markings, which is probably what the "AFC" is.



 See http://tinyurl.com/2xu7as for the official AN specification.



 -Dana



 At 10:59 AM 12/14/2007, Richard Girard wrote:

  	  Quote: 	
		  They're AN bolts. The "X" means they're grade 6.



 Go to: http://www.chiefaircraft.com/airsec/Aircraft/Hardware/Bolts.html 



 click on undrilled and look at the picture.



 Rick



 On Dec 13, 2007 8:04 PM, grantr <grant_richardson25(at)yahoo.com (grant_richardson25(at)yahoo.com)> wrote: 

  	  Quote: 	
		  --> Kolb-List message posted by: "grantr" < grant_richardson25(at)yahoo.com (grant_richardson25(at)yahoo.com)>



 What kind of bolt has AFC and a X on the head?



 Thats the only marking on various sized bolts. 	
	


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  Southern DOS: Y'all reckon? (Yep/Nope)    [quote][b]

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grantr

Joined: 12 Sep 2007
Posts: 217

Posted: Fri Dec 14, 2007 1:36 pm Post subject: Re: Bolts with AFC X marking on them??

yes that is the bolt head.



I keep reading that AN bolts have numbers on them to determine what size they are.



Why don't these have a "an3-4" or similar number? I need some new bolts but these are the only markings.



I can always measure them.  



Thanks

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