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>Try to get the following o-ring 3 - 902 V 894 - 90 
>V refers to Viton 90 is the durometer
>The rest, as best as the o-ring store will tell me is size
>Have used them in multiple Dive Rite manifold rebuilds
>Don't think that McMaster Carr sells this size. 
>Need a specialized company (Iuse AOP in Seattle and Portland) 

I'm not confirming this is the proper size becasue I don't have the
manifold in question, but if it is:
The o-ring size referenced is a tube fitting boss seal which conforms to a
MilSpec MS33656 5/16-24 (1/8") or SAE J514 Table 11 tube fitting. It is
readily available at any good o-ring outlet, hydraulic supply house, and is
available from McMaster-Carr (catalog #104, pg.2804, P/N9752K112 for viton
@ $3.52 for 25). The AS568A size designator is -902. The referenced size
3-902 is the best way to specify. 

Doug Chapman

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