Breach Orings info help

So im gonna order me some orings for spares and to replace the factory breach orings just wanna make sure i get the right ones

I found that they are #011’s Buna 90

i found these on amazon #011 Buna-N O-Ring, 90A Durometer, Round, Black, 5/16″ ID, 7/16″ OD, 1/16″ Width

The Buna – N — is where I’m confused do i want the Nitrile Rubber ones?

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dyotat100

Participant

January 8, 2014 at 3:17 am

McMaster Carr.

011 90d urethane works best. They are off white.

Normal urethane are 70d. You have to scroll down the page further until you get to where it says hard urethane 90d.

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