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Thread standards

Since more and more questions are asked about thread sizes on tap equipment, we have created an overview for you here.

In our article descriptions you will also often find the specification of:

AG = external thread
IG = internal thread

Thefollowing applies to beer dispensers :

Beer side ---> 5/8"
Co2 system ---> 3/4"

Furthermore the page gewinde-normen.de shows why a 1" does not have 25,4mm outer diameter.
On this page all thread types are well described:

http://www.gewinde-normen.de/zoll-rohr.html

In the following table we have listed different threads on taps:

Thread standards taps
Thread size in inch Outer diameter in mm  Place of use
1/8" 9,728 e.g. pressure indicator on mini pressure reducer
1/4" 13,157 e.g. pressure indicator pressure reducer, screw-in nozzles
3/8" 16,662 e.g. connections to mixer tap, Spülboy, flush pipe
1/2" 20,955 e.g. outlet fitting 7bar pressure reducer
5/8" 21,749 Beer connections to taps, beer coolers, tap heads etc.
3/4" 26,441 Co2 connections to pressure reducers and tap heads / water connections
7/16" UNF 11,112 NC=None Coke, Pepsi Dimension
1/2" BSF 12,7 CC=Coca Cola measure, Premix cooler, Coca connections
5/8" UNF 14,50 UNF= American dimension
for water inlet connection on Cornelius Carbonator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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