Stainless Steel bolts

[amalventano1 at tds.net (Allyn)]

ok, beware here, i learned a bunch about bolts when researching replacements 
for the rieger wheel socket head cap screws. i had planned on going with 
18-8 stainless. i even bought a few and did some destructive testing. while 
the stainless may come close to the strength of steel, it requires greater 
torque to achieve the same preload / clamping force. in the case of the 
rieger wheels, i could not go with stainless, because after factoring in the 
"K-value" (the excess torque required to achieve the desired preload), i was 
actually yielding / stretching the bolts beyond their limits.

references:
http://home.jtan.com/~joe/KIAT/kiat_1.htm (a very excellent page, second 
page shows ratings of various bolts).

hth
Al

----- Original Message ----- 
From: "Don Walter" <dswalterwi@gmail.com>
To: "Scirocco List" <scirocco-l@scirocco.org>
Sent: Tuesday, November 16, 2004 10:21 PM
Subject: Stainless Steel bolts


>I want to replace the bolts on my engine with Stainless Steel bolts.
> Mostly the Socket Head Cap Screw ones.  McMaster Carr has btoh 18-8
> and 316 type.  What is the difference?  Which should I use?  Is there
> a more local place that they can be obtained?
>
> -- 
> Don Walter - Waukesha, WI
> 1986 1.8 16V Black Scirocco
> 1986 2L 16V Toronado Red Scirocco (under repair)
> 1988 1.8 16V Toronado Red Scirocco (sold on 3/29/04)
> 1984 1.8 8V Pewter Scirocco (sold years ago)
> 1971 Karman Ghia (sold)
> 1969 Karman Ghia (sold)
> 1969 Beetle (sold)
>
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