Colin Klym

I recently purchased a Weedeater electric trimmer and assembled it according to the owners manual, but when using it for the first time I only got about halfway down one side of my house before the shield came off and the bolt that holds it on got lost in the grass and I can't find it.
The part number for the bolt is 574471601
Can I get sent a new one or can I be given the size measurements I would need to go buy a replacement one at a hardware store?