MTFCA Forum

What size are the mag post, starter, and bendix screws on a 19-25 Hogshead. What about the threads where you bolt it to your pan?

Thanks in advance, Jacob Mangold

Mag Post 3/16"(X) ....Should be 10- 32 x 1/2'" or 5/8" L Pan head single slot, L depending on year of post

Starter 3/8"-16 x 1/2" (X)....Should be 5/16" -18 x 7/8" Round head single slot

Hogshead Cover Door 5/16"-18 x 1/2" L Dome head single slot

Bendix cover 14-24 (obsolete thread) x 3/4"L Round head single slot w/lockwasher (correct from vendors, not hardware store item)

Hogshead to block. 7/16"-14 x 1 1/2" L Hex

Dan

did you really mean 10-32 instead of 3/16-32?

3/16-32 is BSF Fine (Whitworth Thread) and I'm pretty sure that is not called out here, though I don't have access to a drawing

am I about to learn something new this AM?

Scott_Conger wrote: ↑

Sat Jul 08, 2023 9:30 am

Dan

did you really mean 10-32 instead of 3/16-32?

3/16-32 is BSF Fine (Whitworth Thread) and I'm pretty sure that is not called out here, though I don't have access to a drawing

am I about to learn something new this AM?

Well, that dimension source 'as-is" from the Bolt Listing on the Gallery, icon in the upper right of the Forum page. Took it for fact, so will send a note to have this pdf page changed.

https://www.mtfca.com/phpBB3/app.php/gallery/image/1500


Should have known too, that 3/16" wasn't right, did know it is a very fine thread, and takes care to place it, esp. in the alum hogsheads.

Dan

maybe I DID learn something today! (?)

I never knew about that nut/bolt chart so it's a legitimate lesson - and now the question is: is that info from a drawing, or is is a simple error? There's only a couple thou difference between 3/16 and #10 (ignoring the thread form difference)

It's little tidbits like this that I find particularly fascinating, particularly on the rare occasion that such a thoroughly researched subject is found to be in error. If you learn one way or another, I hope you will report your findings. Thanks much for the additional info via your link.

DanTreace wrote: ↑

Sat Jul 08, 2023 9:24 am

Mag Post 3/16"() should be 10- 32 x 1/2' or 5/8" L depending on year of post

Starter 3/8"-16 x 1/2" Round head single slot

Hogshead Cover Door 5/16"-18 x 1/2" L Dome single slot

Bendix cover 14-24 (obsolete thread) x 3/4"L Round head single slot w/lockwasher (correct from vendors, not hardware store item)

Hogshead to block. 7/16"-14 x 1 1/2" L Hex

I have to make a correction.
Starter mounting bolts are 5/16-18 round head slot & seem to range in length from .830-.875 (7/8)

Scott_Conger wrote: ↑

Sat Jul 08, 2023 11:26 am

I never knew about that nut/bolt chart so it's a legitimate lesson - and now the question is: is that info from a drawing, or is is a simple error?
It's little tidbits like this that I find particularly fascinating, particularly on the rare occasion that such a thoroughly researched subject is found to be in error. If you learn one way or another, I hope you will report your findings.

Scott

The Bolt Chart on the Forum Gallery was originally a pdf file that was made by one of the T Clubs out west....forgot who posted it originally. But Adrian Whiteman (NZ) did the great work of putting all in the series on the Gallery. He acknowledged some 'errors' are in the listings.....and has asked for help back when.




I intend to send him message on what corrections have observed and will of course add these, the Bendix cover, and the Starter Motor. Thanks all for providing the proper sizings.

Thank you Dan...and thank you Adrian

a worthy project, for sure.

Scott_Conger wrote: ↑

Sat Jul 08, 2023 3:14 pm

Thank you Dan...and thank you Adrian

a worthy project, for sure.

Adrian's post for help.....seems ones I sent a while ago got away! If any have more... message Adrian via the Forum.

https://www.mtfca.com/phpBB3/viewtopic. ... rt#p190460

Hi guys,

Yes. I put together the 'bolt chart' during that viral lock down using various sources and an original version done earlier.

I am more than happy to make corrections, please send me a PM with the corrections - AND/OR to fill in missing data.

(Thanks Dan - I look forward to the details )

Kind regards
Adrian Whiteman