In Reply to: 2N Hand Crank blueprint, dimensions. posted by Tom (WI) on December 18, 2018 at 18:09:46:
The spring is 2N-17042 and is made from oil tempered steel wire Type S (.063 DIA). 19 coils (17 free) with ends closed and ground. 4.75" free length. I.D. = .74/.76 After coiling heat to 600 degrees F for 30 min.