Hex nut

Somebody lost this in the street - I hope it was not an essential part of whatever machinery it was attached to.

[Pat]

Oh dear, me too!
It certainly looks like it's been well used.

[mittens (Marilyn)]

Cool shot and I agree.

[Nina Ganci]

well spotted

[Monica]

@pattyblue @mittens @ninaganci Thanks for your comments!