Mailing List lml@lancaironline.net Message #55649
From: William Rumburg <lancair403@verizon.net>
Sender: <marv@lancaironline.net>
Subject: [LML] Re: Close Tolerance Bolts
Date: Sat, 10 Jul 2010 21:01:11 -0400
To: <lml@lancaironline.net>
Correction-
NAS 6205-42 bolts are only $12.25 each, but are not available in the required drilled shank from Genuine Aircraft Hardware.
It was, however, easy to drill them myself. With the bolt and castle nut installed and using the castle nut a guide, I carefully drilled the required hole using a 1/32 drill bit and it turned out perfectly.
 
Bill Rumburg
N403WR (Sonic bOOm)
 
 
Scott-
 
While close tolerance bolts are not really justified for most applications, they are for the landing gear. It's nice to slip one in place and feel the difference! There's almost no free-play in my ailerons and elevator, but I intend to try them in the flap system. 
The current spec is NAS 6203 thru 6220, where the last two digits represent the bolt diameter in 1/16 th's. I purchased mine  from Genuine Aircraft Hardware about five years ago and don't believe I spent more than $100. to replace the bolts listed below; however, I just checked current prices and they're about double what I recall, so carefully determine your required length before ordering (the NAS 6205-42 for the lower gear leg's are currently $ 22.27 each). The larger diameter ones are available individually, but smaller ones are only available in packages of 5, 10 or 25. 
 
Bill Rumburg
N403WR (Sonic bOOm)
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