Indeed, that is them. Johnson Hardware is the material we used to
install
the commercial pocket doors. High quality stuff- a league above the
Home
Depot/Lowes hardware.
I am very close to getting my pole barn/shop built; my builder guy
says he will be here Monday to start. I was happily surprised to find
that the heavy-duty sliding door hardware is made by CannonBall, which
is in Beloit, Wisconsin, where I came squalling into the world 72+
years ago in my parents' bedroom.
They have been around a long time and have lots of door hardware. They
are at:
http://www.cnbhnp.com/