I was able to order "drilled, fillister head, 10x24 screw" from Ebay seller.
Had to order 20 with free shipping.....about $5.
Now I have enough for 100 years, but the best way for me to complete the task.
I still need to fabricate the locking tab, see page two of this thread.

This locking tab holds the 1 gallon stop, after official calibration, and is supposed to have an official wire and lead seal.

NewFillister1.jpg
Last edited by tokig; Fri Dec 29 2017 05:38 PM.