The bolts are 5/16" coarse thread grade 5.
The 'washers/spacers' are three small and two large. The small ones go in the middle of the shaft, and on the two ends... The wider washers/spacers go on the two middle....
So from one end of the shaft, it goes; short-wide-short-wide-short....
I would replace them, as I see many of them stretched from over torque. There was an error in the service manual for many years on the torque spec of 30 ft * lb, when it should be 200 - 225 in * lb... 30 ft*lb will stretch and break the bolts.
I can post pictures if you need, just let me know...
You can get a new set for $25:
Retainer and Bolt Package