thread dimesion wit work

[sjpm]

I need information on dimesions on an old pipe thread used in bathtub 30 yrs ago.
My plumber says it is 5/8 w.work

I appreciate it. Thx in advance.
JAG

 

[Mr_David]

Maybe your plumber is right. It sure is hard to tell from this view point?

 

[johnjh2o]

It had me stumped also David.

John

 

[CHRISM]

"Hello",

The Plumber MAY be Thinking of `WHITWORTH` which was the FIRST `Machined` Thread in the World - Although I imagine that He means a PIPE Thread [ British Standard Pipe Thread ?]

Here is a Quote about `British Standard Whitworth`:


The Whitworth thread was the world's first standard [1], devised and specified by Joseph Whitworth in 1841. Until then, every industry had used their own screw threads. The new standard specified a 55° thread angle and a thread depth of 0.640327p and a radius of 0.137329p, where p is the pitch. The thread pitch increases with diameter in steps specified on a chart. The Whitworth thread system was later to be adopted as a British Standard to become British Standard Whitworth.

There is a possibility that what he has Found is a 5/8" Whitworth Thread - as the approximately 55 Degree Pitch of the British Standard Pipe Thread is the same as the Whitworth Thread Pitch - BUT Were / Are British Imperial Pipe Threads in Use in the U.S. - E.G. 5/8" for Plumbing Pipework to a Bath Tap [Faucet] ??


"Regards to All"


CHRISM

 

[johnjh2o]

Learn something new every day.

Thanks Chrism

John

 

[phishfood]

If you notice, the original poster appears to be located in Milan.

Thanks for the interesting bit of history, Chrism.

 

[CHRISM]

"Hello Phishfood",

I had not noticed that they were in Milan - Although Europe has Pipe Sizes that do Not Match very well with what is used in the U.K. - Because the Whitworth Thread is the same 55 Degree Pitch as a British Pipe Thread - I suppose that it is NOT Inconceivable that there is a `European Thread` that matches this 55 Degree Pitch ?

Something that I Remember is that the `British Standard Pipe Thread` was `Universally Adopted` - BUT this could have been when it was First being `Mass Produced` regarding the Threading Equipment - Pipe and Fittings ?? [Mid to Late 1800`s ?] - This Could still be In Use on the Continent of Europe ? - It has `Lasted` here in the U.K. as being the `Best Pipe Thread`available.

Could You Please tell Me - Is the `British Standard Pipe Thread` [55 Degree Pitch] Used in the U.S. - But Called the `United States Standard Pipe Thread` ??

It would be Interesting to Know.


Thanks for Your comment johnjh2o



Regards,


Chris