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What is the difference between the PK4FL and PK22FL ? Both look the same from the front .

Issue:
The difference between the PK4FL and PK22FL.

Product Line:
PTFDS -  FD  enclosure systems

Environment:
Panelboard accessories sold and supported in the USA.

Cause:
Differentiation of characteristics between the PK4FL and PK22FL panelboard locks.

Resolution:
The older PK4FL has flat ears on the backside .Through these are screw holes and screws attach the lock to elevated tabs or brackets on the rear of the trim . The PK22FL has nibs on the back that fasten via screws into flat pieces on the rear of the trim .

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