<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div><span>Alan,</span></div><div><span>There must be a how many threads per mm to how much psi chart out there. You would think if the plug is 7.16 mm long, then that should be your bench mark.</span></div><div><span>Hank</span></div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Friday, November 4, 2016 10:23 PM, Alan via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="y_msg_container">I am still in the process of ordering some pressure transmitters that<br>will screw in to the high pressure port of a scuba tank. Have had a <br>number of quotes, & it looks like some manufacturers will do a limited<br>run with the non standard 7/16 UNF thread. I am not sure what to <br>specify with regard to thread length. Have measured 3 hp ports &<br>they are around 11.5mm deep. The depth gauge thread that screws <br>in to it is about 8.76mm long & the blank / plug that fits in the port is 7.16mm long.<br>Any transmitter thread length over the port depth will bottom out & not <br>be able to compress the o-ring which is on the pressure transmitter.<br>I was thinking of specifying 10mm but wondered if there was an industry <br>standard length. <br>Am nit picking a bit here but want to get it right, as others may want to<br>order the same product if it works well.<br>Regards Alan<br><br><br>Sent from my iPad<br>_______________________________________________<br>Personal_Submersibles mailing list<br><a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div> </div> </div> </div></div></body></html>