I went to Home Depot and bought a large 5/8 interior thread size coupling that is 2" long and has an EXTERIOR hex size of 15/16 ths. It fits the front axle nut PERFECTLY, with NO SLOP. I think it is better than the 15/16th bolt with two (2) 15/16 ths nuts on the end, but I bought that also.
The coupling is part # 2627.
For the bolt, I chose a 3" with a 5/8 thread bolt # 2696 for $.66, and the nuts were # 2596 for $.23 each. Each has a 15/16 ths head.
Fits and works great. Thanks to everyone that gave me the idea for this.
Walt