replacement parts

Hey everyone, It's been a while since I've posted anything on here but I am back at it again with another restoration. This one is an early 2000s Genesis Silver B with a sweet Forest Green lid. This restoration is for my uncle who has been asking me to restore one for him after he saw my own...

Hi all. It's my first post in the group, so I hope I am doing this right. I had to take off the shelves of my Genesis 310 to transport it and lost the bolts in the process. Does anyone know the size of these bolts so I can buy replacements? It appears they are listed at Weber part #62773...