Re. Damper bolts, Just measured some used original bolt, the thread is 5/16 Cycle engineers thread by 26 threads per inch x thread length of 0.460 (11.7 mm)- Old part number 40-G12M-FF94. New part number 01 0699
This bolt has a fibre washer under the bolt head of 5/16 I/d. Old part No. 40-G12M-FF80. New part No.01 0706
The hexaganol head is 1/4 BSW size. You will need to use a 1/4 BSW box/tube spanner if you can find one, I personally use a 13 mm 1/4 drive socket (the only size that I can get in the hole in the bottom of the slider
Possabally the longer bolt are used on later AMC heavyweight forks - I am not sure