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Actually both can be considered correct.  Scott seems
to have a better grasp on the history of dive gear
than most, and that is where the disagreement stems
from.  
This is a particularly confusing subject in light of
the fact that these two valves (the K and the J) got
their names from their catalog reference, yet other
valves which came along later got their names because
of the their SHAPE (the Y and the H).  Since the
original K was a valve for a yoke reg, that can be
defended as the true K valve.  But, no dedicated
letter name for a single DIN valve was ever introduced
AFAIK. The K designation just kind of drifted over to
them and so any distinction between the two was lost. 
99.999% of divers don't know there ever might have
been any distinction.

Anyway, the current state of affairs is that there is
no difference what kind of outlet exists on a
particular valve, as long as it is a single outlet
valve offering no reserve capacity feature, it is
commonly referred to as a K valve.  Kind of an
interesting side note, Dive Rite includes in the group
of K valves a left or right valve from a manifold with
a plug stuck in the end of it a K valve:

http://www.diverite.com/products/gas/std_valv.htm

Maybe we should start calling DIN K valves "N" valves
due to their connection and manifold valves with plugs
"T" valves because of their shape....

JUST KIDDDDDDDING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ray Nixon

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