To insert the tire valve, I know there is a ridiculously cheap cross-type valve tool where you thread it on the outside of the tire valve to pull the tire valve through the hole in the wheel rim, but for emergency use I just want to stock a few nuts that I can thread on the outside of a new valve to use as a ledge to pull the tire valve through the hole as shown here: https://d3vl3jxeh4ou3u.cloudfront.net/10%20-%20How%20to%20Install%20Valve%20Stems%20on%20Tires%20-%20Picture%20of%20person%20pulling%20valve%20stem%20into%20position%20from%20inside%20of%20tire%2C%20using%20needle%20nose%20pliers.jpg
Looking for what nuts to purchase, the Wikipedia for Schrader valves says the typical passenger brass & rubber tubeless tire pop-in Schrader valve has OD threads of:
*TR 418, 0.453 in (11.5 mm) rim hole diam. 2 in (51 mm) long* [*] Metric: 7.7 mm OD, thread root diameter is 6.9 mm ? 0.794 mm pitch [*] Imperial: 0.305 in OD, thread root diameter 0.271 in ? 32 tpi (threads per inch; thread density)
Assuming "Imperial" means "USA", that would mean I need a 32 TPI nut somewhere between 0.271 inches and 0.305 inches in iD, but that doesn't seem to be a standard size for a USA nut. http://www.engineeringtoolbox.com/inches-decimal-equivalents-d_471.html
Even if I look deeper into the granularity, it still seems an odd size: http://www.liming.org/InMoov/pics/decimalchart.jpg
So I simply ask you if you have experence with this problem.
What size nut goes onto a typical US passenger tire Schrader valve?