F150 leaf spring bolt size

[kevinbmx77]

Going to the junkyard tomorrow, need to know the size of the bolts holding the leaf springs on so i bring the right tools, and any other helpful information is appreciated

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[kevinbmx77]

The back is a 21mm and the front is something huge i didnt have, if anyone knows please let me know, its in the junkyard all taken apart except 2 bolts just waiting for someone else to come along. I cant find the size anywhere

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