The Marston Sunbeam Club & Register Forum

General Category => Technical Discussion Forum => Topic started by: Thomas on March 26, 2022, 05:19:20 PM

Title: Lost dome nut
Post by: Thomas on March 26, 2022, 05:19:20 PM
I lost one of the two relatively long dome nuts on the 3/8 inch saddle spring bolt. Does anyone know where I can get them?
Cheers, Thomas
Title: Re: Lost dome nut
Post by: shorrog on March 27, 2022, 09:52:35 AM
Hi Thomas
I could make you one, if you could do a drawing with the dimensions.


Graham
Title: Re: Lost dome nut
Post by: Thomas on March 27, 2022, 11:17:48 AM
Hurray! What a quick answer.  :D I already thought it will be impossible to get it, Graham.

Its overall length is 33mm, the diameter and length of the cylinder part is 13mm and 24mm, respectively. I guess the 3/8 thread is BSF. The wrench size is 15.5mm (5/8 inch?). Do you also have, by chance, a respective chamfered washer? If not I can ask a local workshop.

Cheers, Thomas
Title: Re: Lost dome nut
Post by: shorrog on March 27, 2022, 12:20:24 PM
Hi Thomas
See attached for a drawing, let me know if its correct.
I am not sure what you mean by a chamfered washer can you clarify.
Graham
Title: Re: Lost dome nut
Post by: Thomas on March 27, 2022, 12:32:58 PM
Wow, that is it! I am impressed about what can be found in the club...  :D By chamfered I mean a phase on the outside of the washer. Like a wedge shape (see pic). The washer is obviously made in a lathe. Chamfer, phase, wedge... Gosh! English can be quite difficult...  :o
Title: Re: Lost dome nut
Post by: shorrog on March 27, 2022, 02:01:52 PM
Ok I understand, what is its thickness and external dia I presume the hole is for a 3/8 bolt.
Graham
Title: Re: Lost dome nut
Post by: Thomas on March 27, 2022, 04:01:13 PM
The outer washer diameter is 19.5mm and its thickness is 2mm. Yes, the hole is for a 3/8 bolt.
Title: Re: Lost dome nut
Post by: shorrog on March 30, 2022, 03:43:16 PM
Hi Thomas
Nut and washer are ready.  I have sent you an email ref address to send to.
Graham
Title: Re: Lost dome nut
Post by: Thomas on March 30, 2022, 04:06:32 PM
Tha's so great, Graham, I really appreciate this! Long live the MSC&R!!!