ruffdog
Super Star Member
- Joined
- Dec 31, 2011
- Messages
- 10,686
- Location
- southern wisconsin
- Tractor
- Bobcat Toolcat 5610G, Deere X744, Cub Cadet IH 982
It could be new parts that someone marked up trying to look like QC marks.
On our industrial machines every single fastener of every sort has a paint marker line or dot of a specific color to signify it was torqued or checked to be assembled right. And I mean EVERY fastener.
As already said, almost surely factory inspection marks. Find another one like it and compare. It’s amazing on how long they last and look that fresh. It could be something else but I doubt it.