Screw/bar type knockout seal is inserted in discontinued, open box knockouts to protect exposed wires. One piece pre-assembled screw and backer bar slides on open knockout holes without removing box devices or covers. They are used in standard, air tight or dust tight applications.
NESCO KOS-400 Seal knockout screw/bar steel 4″
Original price was: $22.86.$16.68Current price is: $16.68.
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