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--></style></head><body lang=EN-US link=blue vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><div><h2>Just when I thought I had the answer British Standard Brass comes out of left field. The threaded output on the transmissions is brass but the output on the angle drive (same thread size) is aluminum or possibly zinc die cast. Tracy Tools has a 3/4" X 26 TPI BSC die for £10.00 but is it the right one?<span style='font-size:18.0pt'><o:p></o:p></span></h2></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><a href="https://www.tracytools.com/index.php?route=product/product&keyword=bsc&product_id=979">https://www.tracytools.com/index.php?route=product/product&keyword=bsc&product_id=979</a></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Harold<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:warthodson@aol.com">warthodson@aol.com</a><br><b>Sent: </b>Monday, August 9, 2021 8:13 AM<br><b>To: </b><a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a>; <a href="mailto:manifold@telus.net">manifold@telus.net</a>; <a href="mailto:ah100tech@gmail.com">ah100tech@gmail.com</a>; <a href="mailto:gradea1@charter.net">gradea1@charter.net</a><br><b>Cc: </b><a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a><br><b>Subject: </b>Re: [Healeys] Speedo Drive Thread Size?</p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p><div id=yiv8655725873><div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS";color:black'>Bob, <o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS";color:black'>If you had one available, how would you go about checking the thread angle? <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS";color:black'>Gary Hodson<o:p></o:p></span></p></div><div id=yiv8655725873yqt07661><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS";color:black'><o:p> </o:p></span></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>-----Original Message-----<br>From: Bob Haskell via Healeys <healeys@autox.team.net><br>To: Harold Manifold <manifold@telus.net>; john harper <ah100tech@gmail.com>; Hank Leach <gradea1@charter.net><br>Cc: healeys@autox.team.net <healeys@autox.team.net><br>Sent: Sun, Aug 8, 2021 7:14 pm<br>Subject: Re: [Healeys] Speedo Drive Thread Size?<o:p></o:p></span></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Harold,<br><br>As has been pointed out in separate emails, there are two standards that <br>include 3/4" dia with 26 TPI. British Standard Cycle with thread angle <br>of 60 degrees and British Standard Brass with a thread angle of 55 <br>degrees. Since the speedo drive is brass I would suspect the latter, <br>but I don't have one handy to check.<br><br>Cheers,<br><br>Bob Haskell<br>Austin Healey 3000 BN7/BT7 registrar<o:p></o:p></span></p></div></div></div></div></div></div></div></div></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>