<div dir="ltr"><div class="gmail_default" style="font-size:large">I think tapping over the existing 1/4-28 will result in weak threads. How about a Heli-Coil in 1/4-20?</div><div class="gmail_default" style="font-size:large"><br></div><div class="gmail_default" style="font-size:large">EjR </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jan 15, 2023 at 10:46 AM john <<a href="mailto:jniolon@att.net">jniolon@att.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<div><font face="Segoe UI">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.</font></div>
<div><font face="Segoe UI">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 can</font></div>
<div><font face="Segoe UI">re-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 the</font></div>
<div><font face="Segoe UI">two 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...</font></div>
<div> </div>
<div><font face="Segoe UI">suggestions?</font></div>
<div> </div>
<div><font face="Segoe UI">john</font></div>
<div> </div>
<div><img style="height: 570px; width: 858px;" border="0" hspace="0" alt="" src="cid:185b62bdb471e930a9a1" width="1499" align="baseline" height="1086"> </div>
<div><font face="Segoe UI"></font> </div>
<div><font face="Segoe UI">another option... drill completely thru mount and find a mirror with a stud long enough to pass thru completely</font></div>
<div><font face="Segoe UI">and secure with an acorn nut (or something) at the back side of the mount</font></div>
<div><font face="Segoe UI"></font> </div>
<div><img style="height: 453px; width: 622px;" border="0" hspace="0" alt="" src="cid:185b62bdb489e922e852" width="460" align="baseline" height="364"></div>
<div><font face="Segoe UI"></font> </div>
<div><font face="Segoe UI">another caveat... I don't want to remove the mounts from the door... involves removing windows and regulators</font></div>
<div><font face="Segoe UI">to get to the internal nuts.</font></div></div>_______________________________________________<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr">Eric Russell<div>Mebane, NC</div></div></div>