Thread type on heater switch

[Alex P]

I’m hoping someone maybe able to advise me what thread type the heater switch bezel nut would be as in the photo.

I Know it’s not metric and wouldn’t think it’s a UNF being on a British 60s Car  so i assumed it would be a BSF. I’m not so sure it is now.

Could it be a BSC thread?

Thanks in advance!

[RogerH]

Hi Alex,

      welcome to the forum.

the heater flap is            9/16"  x 24tpi

hotwater valve -              9/16 x 24tpi

Wiper switch                   9/16 x 24tpi

Heater fan                       3/8 x 24tpi 

Choke                              1/2 x 20tpi

Ignition Sw                         19mm x 0.75mm

Roger

 

[Alex P]

Hi Roger

Thanks for the reply.

Now I know the size, i need to know the thread type.

I need to purchase a Tap & Die for this so need to insure I order the correct one.

Is 9/16 24tpi a UNEF thread would you know?

Thanks 

[RogerH]

Hi Alex,

                they are all special sizes but available. The thread angle is of little importance due to their fine nature - 55' or 60' will work.

I am sure that I have these taps/dies. If you are only doing the odd item and want to borrow them I'll check my boxes.

Or have a look at TRacy tools  https://www.tracytools.com/taps-and-dies/brass-cycle-special/9-16-x-24-tpi

Roger

[Alex P]

Hi Roger

just wondering if you’re about this week?

regards 

Alex

[RogerH]

Hi Alex,

I'm going past5y hunting tomorrow. Will be ba ck on Friday PM.  Home all week end.

 

Roger

[Hamish]

2 hours ago, RogerH said:

Hi Alex,

I'm going past5y hunting tomorrow. Will be ba ck on Friday PM.  Home all week end.

 

Roger

Good on you Roger. They are in season and in great condition this time of year.

[RogerH]