Hi Swamprat96,

A manual may help https://cdn.shopify.com/s/files/1/0802/9614/9295/files/COX_New_Generation_19-5398A-5302G-5303L.pdf

To check a nut / bolt head size get a Vernier or just cut some tin or cardboard to the nut size then measure that with a ruler.


Cheers
Max.