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View Full Version : O/T : Fastener notes from Unbrako



tommac95
04-08-2006, 09:23
Fastener Facts (PDF File - 83 KB)
http://www.unbrako.com/docs/Fastener%20Facts.pdf
Fastener Fatigue White Paper (PDF File - 485 KB)
http://www.unbrako.com/docs/Unbrako%20White%20Paper-%20Fatigue%20Failure.pdf

While at it, the following is interesting for two reasons: I.) an illustration shows the 'trilobular'
crossection shape employed effectively (thanks, engineering) on the 6.5 exhaust man bolts, and
II.) there is mention of an alloy , an 'A4' variant , by the Swedish stell mfgr , "Bulten" , which obtains
notable strength , and remarkable corrosion resistance , using composition nearly identical to that
of SS316 , excepting lower C [as in 316L for welded fab] and slightly higher Cr , Ni , Mo {the Mo is essentially what makes
316 stainless where SS304 isn't} , and , i think (not explicitly mentioned this page) , N .
http://www.unbrako.com/docs/Bumax%20Hard%20.pdf

In related search, found a site dedicated to bolts (?):
http://www.boltscience.com/pages/info.htm?
http://www.boltscience.com/index.htm?



If you still don't think the Swedes take steel seriously [maybe 'sincerely' better] , see the image on the final frame , page 6 here, 'bolthenge' :
http://www.unbrako.com/docs/Bumax%20Performance.pdf

turning into a rant.... Great foto [!] of a vessel making way at sea: pg 21 0f a 56 pg pdf at:
http://www.unbrako.com/docs/Bumax%20Catalog-Rev.pdf