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  1. peashooter

    Throttle Stop Shaft O-ring Size

    The Viton -012 orings from McMaster have a durometer (hardness) of A75, the mil spec Buna N orings from McMaster have A65 and A70 depending on which one you look at. So it appears that Viton is a little harder than a standard O-ring but not by much. Viton is better or equal to Buna-N in every...
  2. peashooter

    Throttle Stop Shaft O-ring Size

    According to Mcmaster.com this would be a -012 size o-ring. They have 3 different Mil-Spec Buna-N orings listed, part numbers: http://www.mcmaster.com/#4198T507 http://www.mcmaster.com/#4464T507 http://www.mcmaster.com/#4679T507
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