<html><body><div style="font-family: tahoma,new york,times,serif; font-size: 14pt; color: #009900"><div>brian,<br></div><div>the notation does mean, as you say, no greater than 20 Nm, because of the concern of stripping the threads.<br data-mce-bogus="1"></div><div>obviously, one wouldn't want to set the torque way lower (like 0 Nm!!) or way higher <br data-mce-bogus="1"></div><div>some US manufacturers have suggested for M8x10 as low a 18.7 Nm to as high as 37 Nm? (i guess, nor sure)<br data-mce-bogus="1"></div><div>but the torque does depend on many factors, type of metal, finish, and lube!!!<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>i'm sure sandro and dario can tell us the exact number.<br data-mce-bogus="1"></div><div>amrit<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><b>From: </b>"Brian Eng" <beng@jlab.org><br><b>To: </b>"dsg-rich" <dsg-rich@jlab.org><br><b>Sent: </b>Monday, February 27, 2017 1:26:36 PM<br><b>Subject: </b>[Dsg-rich] Structure Torque Specs<br></div><div><br></div><div data-marker="__QUOTED_TEXT__">Since there don't seem to be any torque numbers on the drawings, I think I found the part from the manufacturer.<br><br>http://www.bettsistemi.com/structural-profiles-and-accessories-p33/coupling-parts-sf241/nuts-and-bolts-f817/connection-plate-861-pr1983.html<br><br>Unfortunately I don't quite understand their notation. Since we're using the M8 screws, does it mean we use less than 20 Nm (which is basically anything) or does that mean at least 20 Nm, in which case, what's the max?<br><br>Should we just set a torque wrench for 15 ftlbf (since 20 Nm = 14.75 ftlbf [but good luck setting that])?<br><br>--<br>Brian Eng<br>Detector Support Group<br>757-269-6018<br>_______________________________________________<br>Dsg-rich mailing list<br>Dsg-rich@jlab.org<br>https://mailman.jlab.org/mailman/listinfo/dsg-rich<br></div></div></body></html>