Differences Between G1/4" Threads - WIKA Blog

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WIKA illustration: G1-4

What is the difference between the numerous G 1/4″ threads? And are they compatible among one another? One of my colleagues also often has troubles and gets confused because of all the various G 1/4″ threads which the market has to offer, or which are requested by the customer.

The most common G 1/4″ threads at WIKA are surely the G 1/4 in accordance with EN 837 or DIN 3852-E. But in addition there are many other pressure connections which are all specified as G 1/4″. For example G 1/4 Ermeto and G 1/4 DIN 3852-A, just to name two. Although, as indicated in the designation, all pressure connections have a thread with the nominal diameter G 1/4″, the types of sealing discern so greatly that in some cases a compatibility is not possible.

Thus, G 1/4 per EN 837 is usually metallically sealed, even in front of the thread. A centring cone offers the possibility to also use self-centring seals. However, this thread, which is used for pressure gauges, requires a blind bore. On the other hand, G 1/4 to DIN 3852-E is widespread in hydraulics. Form E means that behind the thread there is a contact surface with groove, where a standardised plastic flat gasket can be fitted. For this type of thread, a simple through-hole with thread is sufficient.

Your contact person will gladly consult you, should you have problems choosing or designating a thread. Post a comment Click here to cancel reply Name E-Mail (will not be published) Comment Author Portrait von Michèle Beyer Michèle Beyer Dipl.-Ing. (FH)Product ManagementWIKA Alexander Wiegand SE & Co. KG
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I joined WIKA in 1998 and have been working from the start in product management. Every day I answer a wide range of questions on the topic of electronic pressure measurement. Many questions are asked over and over again by WIKA staff and customers from all over the world. So why not answer the most interesting questions in this blog? Related articles
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