Hi Guys;
       I was planning on including the seals with
the "Lamar Couplings" when I distributed them, but
unfortunately due to unexpected business constraints I
ran out of time.
However...........I would like to nominate Paul :-), to
be the bearer of a bag of 0-rings during SNF - OSH and
become a street vendor. :-)
I would gladly do it but Paul is easier to intercept:-)
(I'm a LOT smaller than he is).

Paul you are correct the EPR stands for compound
(Ethelyne Propaline), the 70 is Durometer (resilience
hardness) and the 029 is the dash number (size).

BTW Paul...........Please post the physical dimensions
of the o-ring for our records.

                         Thanks..........Butch

Sure no problem Butch. If you don't have them by S&F I will share my
bag of 100 no charge limit 10 to a customer. Don't push it
by asking me to mail them to you. Call McMaster Carr
yourself and order them :-) http://www.mcmaster.com

The part number works like this. Let's say it is 029 as in this case.

The 0 stands for a 1/16 section size or width.
A 1 here would be 3/32th section size or width.
Each increment of 1 means the section size goes up by 1/32th.
A 2 is 1/8th and so on.

The 29 stands for 1 5/8 inch in diameter. Each increment of 1 means
the diameter goes up by 1/16th of an inch.

Here is a chart from McMaster Carr showing selected sizes.

Paul Lamar
 
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