Thanks! With a simple measurement it can be sorted.
1, Early Huck type 1 inch ( 1/2 and 3/4 ton) to 51
2, Later Bendix type 1 and 1/8 inch (1/2 and 3/4 ton)51 and later
3, 1 and 1/4 for big bolts ( 1 ton and up)37 to 59
Have I got it right this time? I can still mess it up you know.
