<div dir="ltr"><div class="gmail_default" style="color:#3333ff">Simon--</div><div class="gmail_default" style="color:#3333ff"><br></div><div class="gmail_default" style="color:#3333ff">It's hard to tell as the pic gets blurry when enlarged but it is almost certainly a screw fastener that connects to a strongback which draws up tight behind the block's interior and positively prevents the plug from popping out.  I'd appreciate learning the source of the photo as that is the sort of plug I was trying to source--it would be great to carry a couple of those plugs for emergency use.</div><div class="gmail_default" style="color:#3333ff"><br></div><div class="gmail_default" style="color:#3333ff">Best--Michael Oritt</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Fri, Oct 31, 2025 at 8:35 AM Simon Lachlan via Healeys <<a href="mailto:healeys@autox.team.net">healeys@autox.team.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"><u></u>






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<p dir="LTR"><span lang="en-gb"><font face="Aptos"></font></span><span lang="en-gb"></span><span lang="en-gb"></span><span lang="en-gb"> <font face="Aptos">I saw this on Facebook</font></span><span lang="en-gb"></span><span lang="en-gb"></span><span lang="en-gb"><font face="Aptos"> just now. Just curious….what</font></span><span lang="en-gb"></span><span lang="en-gb"></span><span lang="en-gb"><font face="Aptos">’s</font></span><span lang="en-gb"></span><span lang="en-gb"></span><span lang="en-gb"><font face="Aptos"> that thing in the middle of th</font></span><span lang="en-gb"></span><span lang="en-gb"></span><span lang="en-gb"><font face="Aptos">e</font></span><span lang="en-gb"></span><span lang="en-gb"></span><span lang="en-gb"> <font face="Aptos">core plug</font></span><span lang="en-gb"></span><span lang="en-gb"></span><span lang="en-gb"><font face="Aptos">? And</font></span><span lang="en-gb"></span><span lang="en-gb"></span><span lang="en-gb"><font face="Aptos">,</font></span><span lang="en-gb"></span><span lang="en-gb"></span><span lang="en-gb"><font face="Aptos"> if it’s a good thing, why</font></span><span lang="en-gb"></span><span lang="en-gb"></span><span lang="en-gb"> <font face="Aptos">don’t all the plugs have one? </font></span></p>

<p dir="LTR"><span lang="en-gb"><font face="Aptos">Thanks, Simon</font></span><span lang="en-gb"></span><span lang="en-gb"></span><span lang="en-gb"></span></p>

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