Thread sizes

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Thread sizes

Post  parador on Sat 16 Dec 2017, 4:56 pm

It's a pity there is no database listing all the thread sizes for the DCC.

Can anyone recommend a tap and die set please that will cover all the boiler sizes so that I can run a tap through the various threaded holes. Most of the threads seem to be metric but I am not sure that they all are.

In particular can anyone tell me the thread size for the fusible plug. I've fitted the plug but am not sure it is seating in far enough.

Thanks
Martin

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Re: Thread sizes

Post  lynnr on Sat 16 Dec 2017, 7:28 pm

Hi

All the sizes are actually given on the packing lists for all the different studs, nuts and bolts in the kits.

The fusible plug is BSP threads.
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Re: Thread sizes

Post  parador on Sat 16 Dec 2017, 8:33 pm

Do you know what size bsp?

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Re: Thread sizes

Post  lynnr on Sat 16 Dec 2017, 8:43 pm

Think off hand it is 3/8. I will look at my taps tomorrow.
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Re: Thread sizes

Post  parador on Sun 17 Dec 2017, 10:58 am

If all the fittings etc to the boiler are BSP then a BSP tap and die set would be the way to go. Question

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Re: Thread sizes

Post  LiveSteam on Sun 17 Dec 2017, 2:01 pm

Pretty sure all the wash outs and plug are 3/8 BSP on my Agri, the cylinder block saddle I think are metric, so I dont think its a case of just BSP on the boiler, only the bigger stuff.

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Re: Thread sizes

Post  parador on Sun 17 Dec 2017, 4:29 pm

Ok thanks

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Re: Thread sizes

Post  the coleman on Sun 17 Dec 2017, 4:44 pm

Wash out plugs 1/2"bsp
Fusible 3/8"bsp
Cylinder block M8
Belly tank bracket M6
Horn plates M8
Mud hole (Dummy) M8
Not sure on sight glass

Hope this helps


Last edited by the coleman on Mon 18 Dec 2017, 8:43 pm; edited 1 time in total (Reason for editing : Spelling)
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Re: Thread sizes

Post  parador on Sun 17 Dec 2017, 10:48 pm

That helps a lot . Thanks very much.
Regards
Martin

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