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I would like to know what spindle threadings were used.

I do know:
5/16"x40: Current standard threading used by S&G, LaGard, Lebtig locks in magic module format
3/8"x30: S&G vault locks, Chubb 7Lxx (vault size and magic module)
M9x0.75: Kromer locks in vault format (15B, 3011, 3012, 3055)
M10x1: Bode-Panzer locks in a format slightly larger than magic module

Anything else?

The 3/8"x30TPI thread was also used on the S&G 8400 series Centispline dials.

Do you mean these dials? https://time-master.com/products/SGD041-010

This web shop says 5/16 and I found no other information.

It looks like Time Masters has an error in their web page.

D041 spy proof and D037 front read dials used with the S&G 8400 series locks were 3/8-40. A 5/16 dial wouldnt leave enough room for the centi-spline shaft.

http://www.lockmasters.com/sg-8400-seri ... le-sgd41bw

The Lockmasters site shown above is correct.

The Sargent and Greenleaf site used to show good technical details but that all changed after the yellow place took over..

Also I remember Molser using a 1/4"-28 TPI on the 302 locks that were on GSA containers.

Thanks. Makes sense to make a hollow spindle thicker.

MartinHewitt,

Something interesting I ran across the other night that I didn't know was a thing. A spindle extension kit to make spindles longer: http://www.lockmasters.com/sg-mechanica ... -sg7312505

As you can see from the product photo, it is a simple thing, a threded piece both spindles go into and some spline keys without flags to make sure the spindles dont come undone. SImple but clever.

Squelchtone

The spindle extensions are in the S&G catalog for standard and vault spindles.

Halls .492 inches x 18