[GeneBob]

Take out the spring and measure its length. Count the threads per inch of the threaded plug. (1/4) X (Spring Length) X (Threads per Inch) = Number of Turns


I don't know the actual number but let's say the spring is 3/4" long and the thread is 32 threads per inch.
1/4 X 3/4" X 32 = 6 turns from the time that the threaded plug touches the spring.
Like I said, I don't know the actual measurements. I could not find them online.