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Automatic FirmLok™ Door Interlock

FirmLok Interlock

No. 6705-50A.

This effective mechanism is rated for millions of operations. The moment a door is opened, the FirmLok automatically locks the opposing door without the need to turn a latch or activate a switch. The heavy-duty interlock mechanism retracts inside an easy-clean stainless steel housing when not engaged to eliminate protruding hardware. 

Note: FirmLoks are included in the pass-through when originally ordered. The chart below is for replacement FirmLoks.

Replacement Automatic FirmLok
Cabinet
Depth
in. (mm)
For Standard
Pass-Through
For Sliding Door
Pass-Through
Cat. # Price Cat. # Price
12
(305)
6705-50A $ 612 6705-55A $ 612
18
(457)
6705-51A $ 689 6705-56A $ 689
24
(610)
6705-52A $ 765 6705-57A $ 765
36
(914)
6705-53A $ 919 6705-58A $ 919
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