[Shop-talk] retapping a hole

[DAVID MASSEY]

 You could retap it for 1/4-20 and use some loctite (R) thread locker to compensate for the feeble threads that result.  Or just drill it clear and epoxy it in.  Of course there's no turning back at that point.
 
Dave 


 
 
-----Original Message-----
From: john <jniolon at att.net>
To: shop-talk <shop-talk at autox.team.net>
Sent: Sun, Jan 15, 2023 9:37 am
Subject: [Shop-talk] retapping a hole

 I have a mirror mount on my truck door that held a rear view mirror.  Unfortunately the mirror decided it didn't want to stay with my truck.So, I'm looking for a replacement. The mount is drilled and tapped for 1/4"-28 threads and most of what I find is 1/4-20.  I'm wondering if I canre-tap the metal over existing threads with a 1/4-20 thread and it will hold...or will I just make a mess of it and make it broke. The drill side for thetwo thread sizes are within a 64th or so of being the same and the mount is 7/16" or so wide so I have some meat to play with... suggestions? john   another option... drill completely thru mount and find a mirror with a stud long enough to pass thru completelyand secure with an acorn nut (or something)  at the back side of the mount  another caveat... I don't want to remove the mounts from the door... involves removing windows and regulatorsto get to the internal nuts._______________________________________________

Shop-talk at autox.team.net
Donate: http://www.team.net/donate.html
Suggested annual donation  $12.96
Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive

Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/dave1massey@cs.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/shop-talk/attachments/20230115/f8e7b5d2/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: drillthru.jpg
Type: image/jpeg
Size: 20587 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/shop-talk/attachments/20230115/f8e7b5d2/attachment-0002.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 555-90336.jpg
Type: image/jpeg
Size: 72478 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/shop-talk/attachments/20230115/f8e7b5d2/attachment-0003.jpg>