jluckey(at)pacbell.net
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 Posted: Wed Apr 30, 2014 11:38 am Post subject: Was Battery and master contactor - ok to mount horizontally? |
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(Please pardon the hijacking of this thread...)
Jim,
I wasn't the original poster on this thread. I think it was Sacha. However, speaking of Rivnuts...
I've experienced some of the issues you are talking about. The last few times I've used Rivnuts, I put an internal-tooth lockwasher on the back side of the Rivnut before squeezing it, so that it gets clamped between the work surface and the bulge formed by squeezing.
This give some additional thickness for the Rivnut and some sharp edges to help prevent rotation years from now. IIRC I had some difficulty finding appropriate lock washers because they need to fit over the shank of the Rivnut with very little slop, otherwise the teeth won't be engaged by the bulge. Ended up using metric lock washers because they fit the best over the shank of the #8 Rivnut.
Not sure what the long term results will be since it has only been a year or two since I did this install - will let you know in 5-10 years 
-Jeff
From: airelectricjim <jamesmcburney002(at)gmail.com>
To: aeroelectric-list(at)matronics.com
Sent: Wednesday, April 30, 2014 9:55 AM
Subject: AeroElectric-List: Re: Battery and master contactor - ok to mount horizontally?
--> AeroElectric-List message posted by: "airelectricjim" <jamesmcburney002(at)gmail.com (jamesmcburney002(at)gmail.com)>
Hi, Jeff,
A word of caution for rivnuts: Be sure that you use rivnuts that are HARDER than the substrate, in your case stainless steel. Rivnuts have a bad habit of loosening in their holes, making the bolt nigh onto impossible to unscrew. Don't ask me how I know!
This might be even worse if you use aluminum rivnuts, as there will be corrosion between the metals, which will act as a lubricant.
Jim
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