Stainless fasteners - SV650.org

13-07-17, 05:46 AM

Morning org,

I an currently slowly replacing many of the fasteners on my curvy with stainless, should I be using anti corrosion / anti seize products?

maviczap · 13-07-17, 05:48 AM

I always do, it can't hurt

Just a dab of synthetic grease on the threads.

Bibio · 13-07-17, 04:26 PM

be careful using a torque wrench with bolts that have copper grease on them, always drop the recommended torque or you run the risk of stripping threads, especially on aluminium.

SV650rules · 13-07-17, 06:32 PM

Most stainless fasteners are not much stronger than grade 2 because stainless is low carbon and does not harden very well. Even so if overtorqued the aluminium thread will doubtless strip before bolt breaks. Some sources say reduce torque by up to 20% if thread is lubricated because torque values given are for dry thread which has more friction. Both the thread friction and head to part friction are taken into account when required torque value is decided.

316 grade stainless bolts can be up to grade 5 tensile, but generally yield strength of stainless (it 'stretchiness' ) is lower than normal steel bolts.

13-07-17, 05:46 AM	#1
Mickle Guest Posts: n/a	Stainless fasteners Morning org, I an currently slowly replacing many of the fasteners on my curvy with stainless, should I be using anti corrosion / anti seize products?

13-07-17, 05:48 AM	#2
maviczap Member Mega Poster Join Date: Mar 2007 Posts: 9,097	Re: Stainless fasteners I always do, it can't hurt Just a dab of synthetic grease on the threads. __________________ We're riding out tonight to case the promised land Make everyday count RIP Reeder - Jolly Green Giant and comedy genius Last edited by maviczap; 13-07-17 at 05:49 AM.

13-07-17, 04:26 PM	#3
Bibio Member Mega Poster Join Date: Jul 2008 Location: here as devil's advocate Posts: 11,552	Re: Stainless fasteners be careful using a torque wrench with bolts that have copper grease on them, always drop the recommended torque or you run the risk of stripping threads, especially on aluminium.

13-07-17, 06:32 PM	#4
SV650rules Member Mega Poster Join Date: Nov 2016 Location: Shropshire UK Posts: 1,363	Re: Stainless fasteners Most stainless fasteners are not much stronger than grade 2 because stainless is low carbon and does not harden very well. Even so if overtorqued the aluminium thread will doubtless strip before bolt breaks. Some sources say reduce torque by up to 20% if thread is lubricated because torque values given are for dry thread which has more friction. Both the thread friction and head to part friction are taken into account when required torque value is decided. 316 grade stainless bolts can be up to grade 5 tensile, but generally yield strength of stainless (it 'stretchiness' ) is lower than normal steel bolts. __________________ 2016 SV650 AL7 Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain Last edited by SV650rules; 13-07-17 at 08:28 PM.

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