Cover unused knockout holes in steel outlet boxes, junction boxes, and metal electrical enclosures with these Halex snap-in knockout seals. The zinc-plated steel construction provides corrosion resistance and protection equivalent to the wall of the enclosure, meeting NEC 110.12(A) requirements for closing unused openings.

• 1/2" trade size, fits standard 1/2" knockout openings
• Zinc-plated steel construction resists corrosion
• Snap-in installation - press into knockout hole, no tools required
• Covers exposed openings to protect wiring and meet electrical code
• For use in steel outlet boxes and metal enclosures
• UL Listed
• 4 seals per bag