headmark

headmark

(ˈhɛdˌmɑːk)
n
a characteristic
References in classic literature ?
An' they write too, from yonder--my uncle's woman writes--that you can still tell 'em by headmark.
This law requires that industrial fasteners be stamped with a headmark registered with the U.
He said that Public Law 101-592, with its registered headmark requirements, would help end users know who manufactured which fasteners.