DayState O-rings – A Reference for Owners

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    travels4fun
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     DayState O-rings – A Reference for OwnersRevised May 6, 2015

    This list will be updated as best as possible. If anyone wants would like to add info or observes an error, please reply to this post.
    Please note that DayState uses both Imperial or Metric O-rings. For Imperial O-rings, either the British Standard dash number (BS-xxxx) or American Standard dash number (AS568-xxxx) will work.

    Air Wolf O-ring Kit:

    • Metric 25mm x 1.5mm Buna-N A70 (Magazine)
    • BS-003 Buna-N A90 (Bolt Probe .177)
    • BS-004 Buna-N A90 (Bolt Probe .22)
    • BS-008 Buna-N A70 (Transfer Port Bush)
    • BS-111 Urethane A90 (Piston)
    • BS-112 Buna-N A70 (Harper Valve)
    • BS-113 Buna-N A70 (Dust Cover)
    • BS-118 Buna-N A70 (Solenoid Spacer)
    • BS-617 Buna-N A70 (Aluminum Bottle)

    INDIVIDUAL SEALS AND O-RINGS:

    Magazine O-ring (All Calibers)

    • 25mm x 1.5mm Buna-N A70

    Bolt O-rings (aka Pellet Probe): Air Ranger, Air Wolf, MK4, Huntsman, Regal – FAC

    • .177: -003 Buna-N A90
    • .20:   -004 Buna-N A90
    • .22:   -004 Buna-N A90
    • .25:   -005 Buna-N A90

    Bolt O-rings (aka Pellet Probe): Air Ranger, Air Wolf, MK4, Huntsman, Regal – 12 ft/lbs

    • .177: -003 Buna-N A70
    • .20:   -004 Buna-N A70
    • .22:   -004 Buna-N A70
    • .25:   -005 Buna-N A70

    Bolt O-ring: Wolverine 303, B, C, HP (located just inside the barrel not on the actual probe)

    • .22:  5mm x 1.5mm Buna-N A70
    • .303 <Unknown>

    Transfer Port Bush O-rings:

    • -008 Buna-N A70 (AR, AW, MK4, HM)
    • 5mm x 1.5mm Buna-N A70 (AR80)

    Harper Valve O-rings:

    • -112 Buna-N A70 (AW, MK4)
    • -BS616 Buna-N A70 (AR, HM, RGL)

    Dust Cover O-rings:

    • -113 Buna-N A70 (AR, AW, HM, RGL)
    • BS810 Buna-N A70 (MK4)

    Front Valve Body O-rings: (AR, AW, MK4, HM, RGL)

    • -117 Buna-N A70

    Solenoid Spacer O-rings: (AR, AW, MK4, HM, RGL) 

    • -118 Buna-N A70

    Shroud O-ring: MK4

    • 14.5mmx1.5mm Buna-N A70

    Aluminum Bottle O-ring: (AR, AW)

    • BS617 Buna-N A70

    Striker Valve Retainer O-rings:  (AR, AW, MK4, HM, RGL)

    • -006 Buna-N A70

    FAC Valve Stem O-rings: (AR, AW, MK4, HM, RGL)

    • -007 Buna-N A70

    Regulator O-rings:

    • 009 Buna-N A70 (AR, AW, MK4, HM, RGL)
    • -012 Buna-N A70 (MK3)

    Foster Fill Coupler O-ring: (AR, AW, MK4, HM, RGL)

    • 010 Buna-N A70

    Piston O-rings: (AR, AW, MK4, HM RGL)

    • 006 Urethane A90
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    Ted
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    This sort of post is the reason I implemented bookmarks into the forum.  Y’all see that link up in the right corner by subscribe?  There you go.  Daystate owners:  click it!  :)  Then, you can access all your bookmarks in your user profile. 

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    fr8rbum747
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    Book mark….How cleaver.  All this time I have been making copy pastes to Word…and archiving in a folder on my Computer…
    Dang

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    travels4fun
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    Added a whole bunch or O-ring to the list.
    Scott

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    Rubicon_Joey
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    Bookmarked and a little accuracy given to you Scott…Thanks again..

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    Wilson
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    Is there a place to buy a kit with all the o-rings needed for a Huntsman?
    I just went ahead and ordered the packs from Amazon, one each for the above list. I should have enough to last a life time.
    Thank you to those who put it together.

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    Siscakidd
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    The bookmark feature is really a good idea…I can see that saving lots of time in the future 

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    travels4fun
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    “Wilson”Is there a place to buy a kit with all the o-rings needed for a Huntsman?
    I just went ahead and ordered the packs from Amazon, one each for the above list. I should have enough to last a life time.
    Thank you to those who put it together.

    
Complete O-ring kits are only available in the UK at the moment.

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    bobis36
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    So if you own a regal the HM o ring is the same used for it like striker Valve Retainer O-rings:  (AR, AW, MK4, HM)

    • -006 Buna-N A70 The HM works on the redal.. thanks bob
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    travels4fun
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    The Huntsman Regal and Huntsman Classic both share similar O-rings. The O-ring for the striker valve should in theory be the same but not having owned a Huntsman, I can’t say for certain.

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    Keith2324
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    What is a good “local” store to find some of these o-rings? I need one 004 for the Air Wolf .22 bolt probe.

    Thanks,

    Keith.

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    Matt_Dubber
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    This is amazing, thanks! The bolt probe seal ring keeps blowing out on my Wolverine and I’ll probably lose it soon:)

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    Gunnertrones
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    Splendid!

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    travels4fun
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    “Keith2324”What is a good “local” store to find some of these o-rings? I need one 004 for the Air Wolf .22 bolt probe.

    Thanks,

    Keith.

    
I buy all of my o-rings from McMaster-Carr. A pack of 100 Buna-N 004 Durometer 90 rings costs $2.27. Here is the link: http://www.mcmaster.com/#5308t113/=xxwuru

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    Brazos
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    I will add this.  Last year I decided to replace the bolt probe ring on my Daystate CR-Xst in .177 caliber. I was told by multiple sources on multiple forums, including the Daystate Owners Forum I needed an 003.  I was told that all Daystate 177’s were 003 and all 22’s were 004.  This was also confirmed by AOA, Mac1, etc.  Well long story short after receiving 3 different orders of 003 o-rings from 3 different sources none worked.  I just happen to have a 177 that uses a 004 o-ring.  I finally gave up and took the o-ring to a place that sells a lot of o-rings and matched it up.  

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    Keith2324
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    “travels4fun”

    “Keith2324”What is a good “local” store to find some of these o-rings? I need one 004 for the Air Wolf .22 bolt probe.

    Thanks,

    Keith.

    
I buy all of my o-rings from McMaster-Carr. A pack of 100 Buna-N 004 Durometer 90 rings costs $2.27. Here is the link: http://www.mcmaster.com/#5308t113/=xxwuru

    
Thanks for the link. I was just hoping to find something like Lowes or Home Depot because I only need one. But I’ll order some and if anyone lives in the Tampa area, you are more than welcome to have a few as I will have plenty to share.

    Keith.

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    linsfreak
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    Always have this little set with me..

    ?2

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    Keith2324
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    Linsfreak I have two like that but they dont have tbe 003 or 004 sizes. But yes they do come in handy. I bought them mainly for my Shoebox but haven’t had the need to rebuild it yet.

    Keith

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    inverted
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    Hi,

    ​are you guys sure about valve stem o-ring?

    FAC Valve Stem O-rings: (AR, AW, MK4, HM, RGL)

    • -007 Buna-N A70

    BS007 is 3.68mm ID and valve stem is 3.18mm
     

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    steppenwulf
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    any info on the pulsar 177 breech O ring?
     

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