[TheForge] OT. Need torque specs on metric SS bolts (was:Great Resource Library)

[Lon Humphrey]

ok sorry i took so long to get back to you with the info on the torque of 
metric bolts
8 mm low grade bolts should go to 8-12 foot pounds and grade 8.8 would be 17 
foot pounds grade 10.9 ...24 foot pounds and grade 12.9 would be 29 foot 
pounds...that is converted from newton meters

----- Original Message ----- 
From: "Dan Hayes" <dhayes at dthayes.com>
To: "'Sponsored by ABANA'" <theforge at mailman.qth.net>
Sent: Thursday, April 03, 2008 7:33 PM
Subject: RE: [TheForge] OT. Need torque specs on metric SS bolts (was:Great 
Resource Library)


7mm (.276") is close to 1/4". The recommended dry application torque for 
course (20 tpi) is 75 inch-pounds, and 94 inch-pounds for fine (28 tpi) per 
one popular web source 
(http://www.engineershandbook.com/Tables/torque3.htm). If the application is 
critical, use something more detailed like Machinery's Handbook.



-----Original Message-----
From: theforge-bounces at mailman.qth.net 
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Bruce Freeman
Sent: Thursday, April 03, 2008 6:12 PM
To: Sponsored by ABANA
Subject: [TheForge] OT. Need torque specs on metric SS bolts (was: Great 
Resource Library)

Does anyone know of a listing of torquing specs for 7 mm coarse-thread
SS bolts?  (Sorry, I don't have grade of SS, but it's probably 18-8,
304 or 316)  This is a real, practical problem.  On the basis of
information we found for 1/4-20 steel and SS bolts, plus the size
difference, we guesstimated ~120 in-lbs.

Bruce
NJ
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