It can be tough tracking down the right 

Keg Type Gas Post Size – Thread Liquid Post Size – Thread Product Link

• Cornelius Spartan 19/32″ – 18 19/32″ – 18
• Cornelius R (Pin Lock) 19/32″ – 18 (2 Pin) 19/32″ – 18 (3 Pin)
• Firestone A (Pin Lock) 9/16″ – 18 (2 Pin) 9/16″ – 18 (3 Pin)
• Firestone R (Pin Lock) 9/16″ – 18 (2 Pin) 9/16″ – 18 (3 Pin)
• Firestone Challenger 11/16″ – 18 3/4″ – 18
• Firestone Super Challenger 9/16″ – 18 5/8″ – 18
• Firestone V Challenger 9/16″ – 18 5/8″ – 18
• Firestone VI Challenger 9/16″ – 18 5/8″ – 18
• John Wood 85 11/16″ – 18 3/4″ – 18
• John Wood RA (Pin Lock) 9/16″ – 18 (2 Pin) 9/16″ – 18 (3 Pin)
• John Wood RC (Pin Lock) 9/16″ – 18 (2 Pin) 9/16″ – 18 (3 Pin)
• Super Champion 19/32″ – 18 19/32″ – 18
• AEB Kegs 19/32” – 18 19/32″ – 18

Thanks to Keg Outlet for this information. They carry many of these options.

Keg Post Sources

• Keg Outlet carries loads of post options
• Keg Connection has an extensive lineup of keg replacement parts including posts
• Offerings seem to come and go quickly. Search Amazon for “replacement keg posts” to shop around

Keg Post O-Rings

As noted above, I recommend replacing your gas post o-rings frequently.  My suggestion is every other batch.

• Food Safe, Silicone – Keg Post O-Rings for Ball Lock Kegs – Food Safe Silicone – *see note on food safety
• Food Save, FDA Rated EPDM – Keg Post O-Rings – FDA Rated EPDM – *see note on food safety

BLUE Food Safe, Silicone – Keg Post O-Rings – Food Safe Silicone – in BLUE – identical in function but available in custom blue.  The idea is to color code your keg posts for quick identification.  Blue = Beer.

 

 

GREEN Food Safe, Silicone – Keg Post O-Rings – Food Safe Silicone – in GREEN – identical in function but available in custom green.  The idea is to color code your keg posts for quick identification.  Green = Gas.

 

 

Update: More Custom Color Options

Valuebrew has introduced Gray and Black o-rings. As the picture indicates these are designed to match standard gray and black keg QDs.  These have become standard colors on ball lock, pin lock (usually the bottom portion of the QD) and even recently released Kegland QDs (center portion).

The gray and black are also made from food grade silicone and also available in bulk quantities.

• Gray & Black Post O-Rings at Valuebrew!
• Custom Color O-rings at Valuebrew!

More About Post Sizes and Compatible Tools

Ball Lock: There are two primary post sizes for standard ball lock kegs.  11/16″ and 7/8″.  These can come in both 6 point and 12 point, compatible variations.  For the larger 7/8″ posts I’ve seen both 6 point and 12 point styles.  A 12 point socket will work on a 6 point post, but not vice versa.  For the smaller 11/16″ posts I have only seen 6 point.  Not to say that 12 point don’t exist, I just don’t recall seeing any.  I have seen a couple other sizes – 5/8″ and 9/16″, but I would personally consider those more rare, and non-standard.

This is important from a tool perspective.  I recommend a 12 point socket or wrench for larger 7/8″ posts.  Smaller 11/16″ post should work with either 6 or 12 point tools.

Pin Lock: I’m aware of one standard size 13/16″.  As previously mentioned this requires a special notched socket.

Finding Compatible Tools:

• Keg Sockets – Choose Your Sockets – via Keg Connection – choose from ball lock and pin lock compatible sockets
• Search Amazon for “Pin Lock Socket”
• 11/16″ 6 point: CRAFTSMAN Deep Socket, SAE, 3/8-Inch Drive, 11/16-Inch, 6-Point (CMMT43336) – affiliate link, note that multiple variations of this product may be available, as such a different version may appear at this link
• 11/16″ 12 point: CRAFTSMAN Deep Socket, SAE, 1/2-Inch Drive, 11/16-Inch, 12-Point (CMMT47524) – affiliate link, note that multiple variations of this product may be available, as such a different version may appear at this link
• 7/8″ 12 point: CRAFTSMAN Deep Socket, SAE, 1/2-Inch Drive, 7/8-Inch, 12-Point (CMMT47528) – affiliate link, note that multiple variations of this product may be available, as such a different version may appear at this link
• Hands on Review: Craftsman Deep Well Sockets for Ball Lock Keg Posts
• Hands on Review: “Ball Lock Keg Wrench” – 11/16″+7/8″ Ratcheting Wrench – via Apollo Tools Wrench Set

What’s the Difference?

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