OE vs Malcom smith petcock thread pitch?

alright so I am working my through a rebuild and am putting a MS desert tank on since the steel tank is in pretty rough shape. I have an OE petcock but the MS threads are much coarser. I am trying to find out the thread pattern for the MS tank spigot and having no luck. it might be time to make a trip into the local specialty fastener store and ask them to check it. ultimately I am looking for a petcock that will thread on to the spigot for the MS thread pattern

Alternatively I am also on the hunt for a MS tank spigot that has OE threads. this seems to be a unicorn, although I do know is exists as the 430 desert tank I have is set up this way.

If this continues to elude me I may end up having a shop turn a few of them on a lathe for me as its just a simple flanged bolt with a hole down the center. Finding some people who would want to maybe do a group buy would likely drive the cost down but i have no idea how much demand there is for something like that.

This may help. First - measure the treads with a thread gauge:



Then knowing the threads and diameter, search for fuel petcocks from online motorcycle, aircraft, lawn equipment, Amazon, eBay - some examples:


https://www.pingelonline.com/prodcat/fuel-valves.asp

https://www.dimecitycycles.com/air-...&product_list_order=name&product_list_dir=asc

https://www.lowbrowcustoms.com/collections/motorcycle-petcocks

https://www.plastic-mart.com/product/1040/1-4-brass-bulkhead-fitting-10897



Here is a previous thread on Cafe Husky:

http://www.cafehusky.com/threads/need-a-petcock-fuel-tap-for-a-ms-racing-desert-tank.86419/

I have a good usable used one off a 81/82 Husky MS tank. Send me a pm.
Marty

Oh yea, forgot to say the oem Husky thread size is 16 x 1.0
Marty

Sending PM

thanks for all the help guys. I ended up cutting a 5/8 zinc bolt at the shoulder, cutting 16x1 threads and drilling a hole for my own custom made bulkhead fitting. this bike is an equally fun and frustrating project. BTW if anyone here was at the desert 100 in WA this last weekend you probably saw me