<div dir="ltr"><div class="gmail_default" style="color:#3333ff">My goal has been and continues to take the "wobbliness" out of the side curtains which results from having the unthreaded pins drop-fit into the unthreaded sockets and to give as good a weather seal as possible. To that end, several years ago I had a machinist make four brackets to replace the stock-style brackets which came with the NICAL side curtains. The new brackets are machined out of a solid billet of AL. They are about 5/16" thick and are much stiffer than what came with the curtains. I attach them to the curtain frames with SS machine screws and nuts so the brackets are firmly mounted to the side curtain frames. <br><br>Instead of having fixed pins on the lower leg of the brackets they are drilled to receive chrome plated button-head M10x1.50 screws about 1-3/4" long which pass through the brackets. I picked that size because the OD of the screws is just a bit larger than the smooth interior of the stock sockets. I was able to use the screws as taps, and with a bit of machine oil and gentle hand I threaded the socket interiors and I can screw the curtains down onto the sockets with a T-handle and largely eliminate the wobble that was inherent with the stock system where smooth pins simply dropped into the smooth sockets. The screws are loosely retained in the brackets with rubber washers slid up onto the shank and under the brackets which keeps them from falling out when I store the curtains, and also provide a bit of protection against scratching the top surface of the sockets.<br><br>Initially everything was very good but over several years' use two of the four sockets--which are threaded into the wooden blocks--have become loose because of wear in the wooden blocks' thread and I can no longer draw the button head screws tight without the sockets rotating in the blocks, etc.<br><br>I have a couple of solutions in mind but all involve getting the sockets firmly attached to the car. The easiest would involve replacing the wood blocks with metal ones fixed to the doors' interiors with holes tapped to screw the sockets into (which would preserve the eccentric adjustment the sockets furnish) but in any case I need to know what is the thread on the sockets. The set of dies I have are not of sufficient diameter to accommodate the exterior of the sockets for sizing and in any case I doubt that the thread is either SAE or Metric.<br><br>I hope this long explanation explains my problem and thanks for your interest. BTW I will post pics, hopefully tomorrow, of the brackets and fasteners. I have no pride of authorship and hereby waive all rights and release the concept to any other semi-compulsive owner of any side-curtain-equipped vehicle.<br></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"><div dir="ltr" class="gmail_attr">On Thu, Nov 21, 2024 at 7:56 AM Michael Oritt <<a href="mailto:michael.oritt@gmail.com">michael.oritt@gmail.com</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 dir="ltr"><div class="gmail_default" style="color:rgb(51,51,255)">Can anyone please tell me the thread size of the side curtain sockets including the TPI, pitch, diameter, etc--and where I might purchase a die for same?<br></div><div class="gmail_default" style="color:rgb(51,51,255)"><br></div><div class="gmail_default" style="color:rgb(51,51,255)">Best--Michael Oritt</div></div>
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