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No. 6 Stopper - Drilled



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Drilled gum rubber stopper. Used to provide a positive seal on fermentors.

Top Diameter: 1.26"

Bottom Diameter: 1.024"


Availability: In stock

Pic of SD6

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  • No. 6 Stopper - Drilled
  • Pic of SD6
Product Details

Drilled gum rubber stopper. Used to provide a positive seal on fermentors. Drilled hole is compatible with standard airlocks.

Top Diameter: 1.26"

Bottom Diameter: 1.024"

Not sure if this is the correct stopper for your purposes? Consult our stopper information table below:

Stopper TypeCompatible With:
No. 2 Drilled Stopper Standard Beer bottles
No. 5 Drilled Stopper Big Mouth Bubbler® EVO 2 w/screw-on lid (older EVO 2 models) & Little BMB
No. 6 Stopper Drilled or Solid 1 Gallon Jugs
No. 6.5 Stopper Drilled or Solid Glass carboys, Big Mouth Bubbler® plastic (5 or 6.5 gallon) or EVO 2 w/ Universal Lid. Ideal fit is 6 gallon carboy.
No. 7 Drilled Stopper 5 Gallon glass carboys
No. 10 Drilled Stopper Bubbler® 5 or 6 gallon
Small Universal Stopper - Drilled or Solid Glass Carboys (3, 5, 6, 6.5), Big Mouth Bubbler® Plastic 5 or 6.5 gallon or EVO 2 w/ Universal Lid.
Medium Universal Stopper - Drilled or Solid Bubbler® 5 or 6 gallon
Additional Information
Support Documents: No
4.9 / 5.0
9 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Keeps the bad stuff out
Easy to use, easy to clean. I usually buy one or two of these (with airlocks) every time I place an order to put on my ever growing collection of 1 gallon carboys.
September 29, 2013
Great for 1 gallon jugs
June 26, 2014
Works well with the one gallon jug does the job!
March 11, 2010
It fit as promised
It fit as promised
July 29, 2016
Works great.
Plugs up my fermentor just like a big chunk of rubber should.
February 18, 2017
2 months ago
Works good
I'll give it 5 stars because it works well. I had previously bought the 4x1 gallon carboy kit, and it came with the plastic airlock caps. I'm no expert but I just don't trust those things to do the job. These work really well. If they have one draw back, it would be that they are almost too small. Too much force and this plug will definitely go into the carboy. But once it is snugged in with an airlock it fits and holds really well.
July 18, 2016
No. 6 drilled Stopper
Works perfect on every 1 gallon bottle we have
June 18, 2016
cant wait to try it
December 8, 2015
Great value
Almost too small for the 1 gal. But, still work pretty good
March 9, 2017
2 months ago
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Browse 3 questions Browse 3 questions and 5 answers
What size tubing fits into this stopper?
James M on May 21, 2016
BEST ANSWER: The hole is slightly over 3/8? (~0.390?) so 3/8? OD tubing will fit into the stopper. 7/16? OD tubing will fit tightly but you can get it into the hole if you wet it first.
What size tube fits securely in the drilled hole?
Topher on Jan 19, 2016

It's a bit of a squeeze but our 5/16" siphon tubing will go through the hold in the drilled stopper.


What brand is this?
C U on Dec 22, 2015
BEST ANSWER: Hi Curtis, We don't have a specific brand for this item but it is a standard no. 6 drilled stopper

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