3M / OS header O-ring size

[Rcmaster199 at aol.com]

In a message dated 5/24/2003 12:39:47 AM Eastern Daylight Time, 
davidflynt at earthlink.net writes:


> Subj:RE: 3M / OS header O-ring size 
> Date:5/24/2003 12:39:47 AM Eastern Daylight Time
> From:<A HREF="mailto:davidflynt at earthlink.net">davidflynt at earthlink.net</A>
> Reply-to:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> To:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> Sent from the Internet 
> 
> 
> 
> Jim,
>  
> Take the piece or the o-rings down to your auto parts store, and ask to see 
> their o ring collection.  Find the one that fits.  If it is a decent parts 
> store, they will have dozens of sizes.  I shop at Napa for these.
>  
> David
> 
> >> -----Original Message-----
>> From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On 
>> Behalf Of Woodward James R Civ 412 TW/DRP/ACQ
>> Sent: Friday, May 23, 2003 10:11 AM
>> To: discussion at nsrca.org
>> Subject: 3M / OS header O-ring size
>> 
>> 
>> Hi All,
>> 
>>  
>> 
>> Does anyone have a part number or size that I can use to go to the hardware 
>> store and get some more of the rubber o-rings for the headers?
>> 
>>  
>> 
>> I've found that if you don't support the pipe and header, they wear out 
>> fast!
>> 
>>  
>> 
>> Thanks,
>> 
>> Jim W
>> 
>> 
>> 
> 

Jimbo, David,

Just a word of caution. The auto or hardware store variety is probably made 
of Neoprene or something similar. This type of rubber is okay to get you out of 
bind temporarily, for a flight or maybe two, but no good long term. Teltale 
signs of the wrong rubber type are quick wear, flat spots, hardens quickly and 
cracks.

You should try to get fluoroelastomer o-rings, like Viton, or silicone 
rubber. McMaster Carr will most likely have what you need, but you'll ned to measure 
the ring. The local ACE, as Dave suggests, would be able to get the 
measurement for you, if you don't have access to a mic or caliper

good luck

matt

Good luck
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