Bulk Keg Orings and Keg Repair Part Numbers

You can save a bunch by buying homebrew keg o-rings in bulk.  Here are some part numbers, background and tips on keg gaskets along with some part numbers and sources for additional keg repair parts.

Silicone vs Buna-N

Silicone is softer than Buna-N.  Silicone also remains softer at cool temperatures.  Because of this, silicone is supposed to provide a better seal.

I use use Buna-N on my liquid posts because they are cheaper and I figure a leak is going to be very evident – Beer is… visible.  I use silicone on my gas posts because they seal better.  You cannot see leaking CO2, so I want these to seal as well as possible.  This also color codes posts for easy identification.  Black o-rings are liquid and orange o-rings are gas.

A Note on Gas O-rings I am quick to replace gas o-rings.  This leak is difficult to test for.  I lost an entire CO2 tank because of a bad gas o-ring.  In bulk, these are cheap, replace them liberally.

Keg Dip Tube O-rings

Keg Post O-Rings

Keg Lid O-Rings

O-Ring Sets

Leaky Lid-Orings

William’s Brewing Oversize Keg Lid O-ring is slightly over-sized and made from a softer rubber.  It’s designed to help you achieve an airtight seal for leaky ball and pin lock keg lids.

Internal Ball Lock Quick Disconnect O-Rings

Silicone: 013 Silicone O-Ring, 70A Durometer, Red, 7/16″ ID, 9/16″ OD, 1/16″ Width (Pack of 100)

Theses o-rings aren’t exactly the same as the standard square sided o-ring that comes in quick disconnects, but they do work well for me and this is certainly more economical than buying a whole new quick disconnect.  Here is an exact replacement for CM Becker Ball Lock Quick Disconnects.

Pin and Ball Lock

I only use ball lock kegs, but it’s my general understanding that pin locks and ball locks use the same o-rings.  On the post o-rings, what I’ve heard is that the silicone seem to be the best choice because OEM pin lock post o-rings are slightly large than dash 111, but smaller than the next size up.  The flexibility of silicone makes them work better than the Buna-N version on pin lock kegs.  I have heard back and forth on this issue, so you’re experience may vary.  Related: What’s the Difference Between Ball Lock Kegs and Pin Lock Kegs

Universal Poppet O-Rings

Size Dash 008 fit all styles of Universal Poppet that I have tested.  Since universal poppets can vary slightly between manufacturers, I cannot guarantee they will work with your poppet.

Buna-N: 008 Buna-N O-Ring, 70A Durometer, Black, 3/16″ ID, 5/16″ OD, 1/16″ Width (Pack of 100)

Silicone: 008 Silicone O-Ring, 70A Durometer, Red, 3/16″ ID, 5/16″ OD, 1/16″ Width (Pack of 100)

A note about food safety Most of the o-ring part numbers that are linked to in this post are not specifically marketed for food use or as food safe.  That’s true of many of the o-ring offerings I see across a range of sources.  I have an offering pulled up as I write this that offers 5 o-rings (1 lid, 2 post and 2 dip tube) for ball lock kegs.  They appear to be Buna-N but the description says nothing about what material they are made of or if they meet food safety certifications.  You may feel better about purchasing a gasket from a homebrew shop and feel like it’s “food safe” because it’s being marketed as a for use in a keg, when, in fact, it may be identical to the parts listed here.  Also, How much contact do these have with your beer?  For lid o-ring – yes.  I think that is exposed on the inside of the tank.  So, if you splash beer up on that, there will be contact.  The internal ball lock o-ring probably makes contact as well.  As for me… I have every o-ring listed above and I use them on my kegs and ball lock QDs.  All of this to say… if you’re concerned about using gaskets that are specifically marked as food safe you should keep looking.

Other Keg and Kegerator Rebuild & Replacement Parts

Other Gasket Options

  • Quad-Seal Gaskets: These are OEM-style dip tube O-rings that seal more easily than standard options – this offering from Brew Hardware gets you a complete set of pin or ball lock o-rings including quad seal dip tube

Keg Repair Parts

  • Universal Poppets – I use universal poppets exclusively when rebuilding kegs.  Tip: These fit the vast majority of kegs without issue.  I have had a couple kegs that ended up being a bit too tight with these
  • Keg Lid Feet – Bad or missing keg lid feet can cause keg lids to seal improperly – AIHWilliam’s Brewing
  • Keg Lid with Hang Tab – from William’s Brewing. includes an interior hang tab for hanging dry hop bags.  If you you need to replace keg lids – might as well get a hang tab
  • Replacement Keg PRV Valves – check compatibility with your keg
  • Replacement Keg Lid (includes PRV) – ball lock style lid
  • Replacement Pin Lock Style Lid (no PRV) – if you’re replacing lids on pin lock kegs, I suggest using ball lock style lids.  Those include manual PRV valves that making venting your keg a whole lot easier.
  • Pressure Relief Valve Ring – check compatibility with your keg
  • Ball Lock QD Repair Kit – via Adventures in Homebrewing
  • Pin and Ball Lock Quick Disconnects.  In my opinion CM Becker make the best quality QDs out there.  Keg Connection has a great selection and repair parts.  However, Keg King is making some that seem to be of equal quality for ball lock kegs (no pin lock options.  Check out William’s to take a look at those – Ball LockPin Lock
  • Dip Tube Screen
  • Gas Dip Tube
  • Liquid Dip Tube – Straight – for Firestone and Cornelius
  • Curved Liquid Dip Tube
  • Pin Lock Kegs require a special socket to remove the post {See: What’s the Difference Between Ball Lock Kegs and Pin Lock Kegs].  Those can be relatively pricey.  This eBay offering is the best everyday value I’m aware of for one of those sockets.
  • Keg parts pages – finding compatible parts for PRV valves and post bodies can be tricky.  Here are parts landing pages for some of the homebrew shops I recommend – Adventures in Homebrewing, Austin Homebrew SupplyBrew Hardware, Keg Connection – huge selection of homebrew and commercial keg parts, MoreBeer, William’s Brewing
  • Racetrack style kegs – standard kegs, both pin lock and ball lock are… standard.  Some parts on those are interchangeable – dip tubes, o-rings, universal poppets.  The big outlier are… racetrack style ball locks.  These perform the exact same function but some of the parts are not what I would call standard – the lids are more oval and the dip tubes and other parts are different.  As of this posting, Adventures in Homebrewing is the place to get hard to find racetrack keg parts.  These used to be very hard to find.  AIH has scooped up a lot of what was left and had other parts manufactured.  – Search racetrack at AIH

Faucet Repair Parts and Resources

Odds and Ends

Stainless Steel Ball Lock Quick Disconnects

Also: Kegerator Tips & Gear | Keg Repair Part #s | Recent Keg Finds

Our Top Draft Resources


McMaster Carr is also a good source for bulk o-rings.  McMaster does charge an additional shipping fee.  Their website does not show that.  It’s added on after you place your order.  To get exact shipping charges you need to call or email McMaster for a quote.

McMaster Carr Part Numbers
  • Dip Tube O-rings Buna-N – 9452K172
  • Dip Tube O-rings Quad Sealing Buna-N – 90025K368
  • Post O-rings Buna-N- 9452K23
  • Post O-rings Silicone – 9396K24
  • Lid O-rings Buna-N – 9452K218
  • Lid O-rings Silicone – 9396K926
  • Internal Quick Disconnect O-rings Silicone – 9396K18


Make sure the components you use are compatible and rated for your intended application.  Contact manufacturer with questions about suitability or a specific application.  Always read and follow manufacturer directions.

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10 thoughts on “Bulk Keg Orings and Keg Repair Part Numbers

  1. John

    Is there a general length to go by for the poppet springs? Not sure how much pressure needs to be on the poppet to seal right. Don’t want to break anything.

    1. admin Post author

      No, not really. If the QD is hard (sometimes impossible) to get on, I trim 1/2 coil off at a time until it goes on with reasonable/regulator pressure and effort.

  2. Scott

    Read that 013 7/16″ ID, 9/16″ OD, 1/16″ Width are universal popit o-rings. I have a set on order, will let you know: https://www.amazon.com/gp/product/B000FMYQS0/

    008 fit mine a bit loose. As these are not exactly a standard, may be hard to know which is right.

    Anyone find the thin gasket for the top of a ball lock quick disconnect? They will need to be very thin width-wise.

    1. admin Post author

      I think those will be too big. They get larger and the dash numbers increase, so 013 is larger than 008. 008 fit all of my universal poppets – see this post. 013 work for internal ball lock QD o-rings. Having said that… I’d love to hear how they work for you.

  3. Jonathan

    Silicone: 417 O-Ring, Silicone, 70A Durometer, 3-1/2″ ID, 4″ OD, 1/4″ Width, Red (Pack of 5)

    has been unavailable on amazon for like 1-2 years from what i’ve seen. might be worth removing or updating link.

  4. _Dan_

    This is the O-Ring for most replacement keg PRVs.

    007 Silicone O-Ring, 70A Durometer, Red, 5/32″ ID, 9/32″ OD, 1/16″ Width

  5. rockethacker

    best thing i ever did was buy two colors of post o-rings from McMaster. Black for beer. Green for gas. Now i never get them mixed up when making connections inside of my dimly-lit kegerator.


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