Electrical Box Knockout Plugs

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HUBBELL 5269-0 Closure Plug, 1/2 in Trade, Zinc, Gray

HUBBELL Closure Plug, 1/2 in, Zinc, Gray, 0.313 in L, 75, Polybag, For: BELL Weather-Proof Boxes, Extension Adapters, Cluster Covers and Round Splice Boxes to Seal Off Unused Outlets