Where to get this fuel cap online?

[Tony Brooks]

7 hours ago, magnetman said:

Indeed and if the wall thickness of the pipe was about 4mm that would make it about 48mm which is the diameter of a male 1.5 BSP thread. 

 

In fact it seems the major diameter is 47.8mm for 1.5BSP

 

 

 

So it probably is 1.5BSP which is what most of these are. 

 

 

 

 

 

https://www.britishmetrics.com/images/pdf/technical/bspp_bspt_4.htm

 

This is what I found when I looked up a BSP dimensions table, hence my suggestion of probably 1.5" BSP

[wandering]

The cap arrived! It’s the right thing. Only my incompetence reared it head again. The thing is too big and sits atop the opening rather than screwing down. Have ordered another. Thankfully they are cheap as chips. 

Edited April 23, 2023 by wandering

[Tracy D'arth]

so, what did you get and what size should it have been?  We are dying to know!

[wandering]

On 23/04/2023 at 11:11, Tracy D'arth said:

so, what did you get and what size should it have been?  We are dying to know!

I got a 1 1/2” but needed 1 1/4”! Fits perfectly!

[Ronaldo47]

So my deduction based on scaling from the thread pitch (April 16th post)  was correct.  Nice to know I'm.not completely ga-ga yet! 

[wandering]

8 hours ago, Ronaldo47 said:

So my deduction based on scaling from the thread pitch (April 16th post)  was correct.  Nice to know I'm.not completely ga-ga yet! 

Yet! It was your post which made me buy another cap lol