I second the river idea.  Quick, easy and cheap and no dissimilar metals.
Bruce 1994 C&C 37/40+


Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: "Matthew L. Wolford via CnC-List" 
<cnc-list@cnc-list.com> Date: 5/2/18  11:30 PM  (GMT-05:00) To: 
cnc-list@cnc-list.com Cc: "Matthew L. Wolford" <wolf...@erie.net> Subject: Re: 
Stus-List Stripped threads question 



Thanks, Josh.  With seven exit plates, each with four mounting holes, 
I can think of 28 reasons to not drill and tap each hole.
 
The original exit plates had six holes each (as opposed to the current 
four), all of which were filled with aluminum screws (held in place with epoxy) 
that were ground off at the surface before the mast was repainted six or seven 
years ago.  I have no interest in undertaking that sort of job, which I 
believe to be unnecessary.
 
Backing nuts would be too difficult to hold in place to screw into given 
the relatively small opening of the exit plate.  Not practical.   

 
I kind of like your rivet idea, and I forgot about JB Weld.  Any other 
thoughts out there?


 

From: Josh Muckley via CnC-List 
Sent: Wednesday, May 02, 2018 9:23 PM
To: C&C List 
Cc: Josh Muckley 
Subject: Re: Stus-List Stripped threads question
 

I forgot to mention that when I had my mast rebuilt the boatyard welded all 
of the old vestigial holes closed before painting.  Of course you're 
probably not even considering something to this extent. 
 
Josh
 

On Wed, May 2, 2018, 9:20 PM Josh Muckley <muckl...@gmail.com> wrote:


  You can rivet them.  Mine are.  Aluminum rivets won't corrode 
  the mast. 
   
  There really isn't a good reason not to go up to a #12 machine 
  screw.
   
  Of course there are epoxy materials such as JB weld in liquid or in a 
  stick.  I'm not sure that they would produce a lasting repair. 
   
  What about backing nuts?
   
  Ever heard of riv-nuts?  They go in like rivets but are threaded for 
  a machine screw fastener.
   
  Josh Muckley
  S/V Sea Hawk
  1989 C&C 37+
  Solomons, MD
   
  
  On Wed, May 2, 2018, 9:12 PM Matthew L. Wolford via CnC-List 
  <cnc-list@cnc-list.com> wrote:

  
    
    
    
    
    Listers:
    
     
    
        
    Currently doing some mast work and needed to remove and reinstall a couple 
    stainless steel exit plates.  The plates are held in place with four 
    stainless machine bolts (10-24 or thereabouts), which screw into threaded 
    holes in the aluminum mast.  I discovered that the threads were 
    stripped in several of the holes – probably due to dissimilar metals.  
    Aside from drilling and tapping new or larger holes (which I prefer to not 
    do), is there some other way to reconstitute the threads to hold the screws 
    in place.  Strength is not really an issue.  I was thinking about 
    coating the screws in epoxy or something, but I figured someone on the list 
    may know some other trick.  Thanks in advance.
    
     
    
     
        
    Matt Wolford
    
        
    C&C 42 Custom
    
 
    
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greatly appreciated.  If you want to support the list - use PayPal to send 
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