what do you call it?

[Ron Nossaman]

>I've looked twice in Piano Parts and Their Functions, but didn't see it,
>and I like to learn as many "official" parts names as possible.
>
>This was a Kawai - Yamaha probably has a different name for it.
>
>Anyone know?
>
>John Formsma

It could officially be called about anything, but it's a turnbutton when 
it's used on screen doors, boat covers, tonneaus, etc.

Ron N