O-ring Size Chart: Classic, RT and X-valve, L10, ULT, Emag

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  • alpha_q_up
    Hug Supplier
    • Jul 2020
    • 416
    • Paso Robles, CA

    #1

    O-ring Size Chart: Classic, RT and X-valve, L10, ULT, Emag

    I seen this thread bumped recently and figured I'd cross post it for anyone interested. Personally I'd advise anyone to use AGD's o-rings, but I know I've used some generic o-rings before to get me out and on the field.
    Thread was originally posted by Justus on AO.


    These have been posted before, though incomplete and not stickied. They're also on MCB. But people on AO ask for them from time to time, so I thought I'd repost the information in hopes that it can remain easily accessible. If I'm missing something or have something wrong, let me know and I'll update this original post.

    O-ring Size Chart

    * All o-rings are 90D urethane unless specified *

    Originally posted by sunshaker:
    Classic Valve (for Automag 68 and Mini-Mag; 1 rebuild)
    4 Power Tube O-rings 010
    4 Teflon O-rings 006 (PTFE)
    2 Barrel O-rings 018
    2 Reg. Piston O-rings 012
    1 Reg. Body O-ring 116

    RT Classic (1 rebuild)
    3 Field Strip Banjo O-rings 009
    3 Barrel O-rings 018
    2 Power Tube O-rings 010
    1 Reg. Piston O-ring 012
    2 Reg. Seat O-rings 008
    1 Reg. Body O-ring 018
    2 RT On/Off Small O-rings 004
    4 RT Reg. Valve Pin O-rings 006

    Level 10 Bolt (1 install)
    2 Carrier O-rings 008
    1 Power Tube Tip O-ring M1.78X7.94?!? (I need to confirm this. Is this the same Size as would be found on other mag valve tips? I had a dead one in an old Mini-mag that I couldn't figure out the size for, but I replaced the Level 7 with a Level 10 and didn't need it anymore.)

    Originally posted by Justus:
    X-Valve (for RT-Pro, RT Custom, Emag, and Xmag; 1 rebuild)
    2 Power Tube (on/off bottom) O-rings - 010
    1 Reg. Piston O-ring - 012
    3 Reg. Seat O-rings - 008
    1 Reg. Body O-ring - 017
    2 RT On/Off Small O-rings - 004
    4 Reg. Valve Pin O-rings - 006
    5 L10 Carrier o-ring - 008

    Additional information:
    Emag Quad O-ring - 006 (0.070" width, Buna-N; cross section looks like an "x")
    ULT Outer (large) O-rings, top and bottom - 010
    ULT Top (small) O-ring - 006 (fits around the ULT pin coming out the top)
    ULT Inside (tiny) O-ring - off the charts small (Buna-N; sold by AGD or Tuna)
    L10 Powertube Shims - .010" thickness, otherwise same dimension as ULT shims
    ULT Shims - .005" thickness, otherwise same dimension as L10 shims
    X-valve Red Powertube O-ring - 1mm X 20mm (Buna-N 70D; not exact, but a suitable replacement as confirmed by hill160881)
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  • Walletclan
    Old Skool Baller
    • Sep 2025
    • 4
    • North Texas

    #2
    What is the size of the white oring that goes inside the carrier in the Lvl 10 bolt? Part number 2 in the diagram.
    Attached Files
    Balling since 1995

    Comment


    • Alexndl
      Alexndl commented
      Editing a comment
      I think it's a 008 oring
  • Ben06
    Certified Post Whore
    • Jul 2020
    • 558
    • Michigan

    #3
    Where's the best place to get full rebuilds?
    Feedback: https://www.mcarterbrown.com/forum/b...k/7585-ben06-s

    Comment


    • superman
      superman commented
      Editing a comment
      AGD.
  • Ben06
    Certified Post Whore
    • Jul 2020
    • 558
    • Michigan

    #4
    Fixed
    Last edited by Ben06; 01-06-2026, 08:11 PM.
    Feedback: https://www.mcarterbrown.com/forum/b...k/7585-ben06-s

    Comment


    • FredMnkyDad10
      FredMnkyDad10 commented
      Editing a comment
      No classic valve the whole valve is stainless steel. And most are level 7. That is valve that came with micromag, usually with electric frames. The back half of that is aluminum why its different color. Most have level 10.

      What does the rest of the marker look like?

    • Ben06
      Ben06 commented
      Editing a comment
      My emag I'm trying to get rebuilt. What rebuild kit would I want to order for that valve?

    • superman
      superman commented
      Editing a comment
      You should get the xvalve rebuild kit since this has a level 10 bolt. I would also order a quad oring as well since it is an emag. They are not included in the kit.
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