What is the thread on a bulkhead mounted RCA/Phono socket ?

[Alan Wood 4Participant @alanwood4]

It is close to 6mm / 0.25" and is not M6 fine or coarse but somewhere between these two. Doesn't appear to be UNF or BSF or BA. All engineering drawings found on the net so far do not specify what the thread is.

For something so common in the AV world there must be a standard ?

[Alan Wood 4Participant @alanwood4]

[Brian OldfordParticipant @brianoldford70365]

Ah! Standards. You can have as many as you want.

[Brian OldfordParticipant @brianoldford70365]

Joking apart; could it be one of the early sub 1/4" US threads shown here? https://sizes.com/tools/thread_american.htm

[Ed DuffnerParticipant @edduffner79357]

Hi Alan, do you mean the guitar type or the Hifi type? One is phono, the other is RCA. Can you upload a photo?

Ed.

[SandgrounderParticipant @sandgrounder]

A quick look on the RS Comps' website and they are shown as 1/4" – 36 NUEF, which I am assuming means National Unified Extra Fine?

John

[Jeff DaymanParticipant @jeffdayman43397]

Thread 1/4"-36 UNEF is commonly used on many telecom and RF connectors even now. NUEF is probably a typo – UNEF stands for unified national extra fine. JD

[john swift 1Participant @johnswift1]

it looks like every one has their own standard

a  chassis mounting  phono socket with a    1/4"- 28  thread  from Farnell

http://www.farnell.com/datasheets/1944140.pdf

 

or  chassis mounting phono sockets   with  a 1/4" – 32   thread from Farnell 

http://www.farnell.com/datasheets/1910868.pdf?_ga=1.63790508.2096815931.1475088858

http://www.farnell.com/cad/28985.pdf?_ga=1.62698287.2096815931.1475088858

 

John

 

Edited By john swift 1 on 28/09/2016 20:14:17

[Geoff TheasbyParticipant @geofftheasby]

May I suggest a very useful standard? Don't use RCA/Phono connectors!

Geoff

[Alan Wood 4Participant @alanwood4]

Thanks everyone, much appreciated. My project can proceed.

[Author]

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