Knockout Closers
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Part #MTAL 150KOS 1-1/2" (3)PIECES KNOCK-OUT SEAL Metallics Knockout Seal, 3-Piece, 1-1/2 in Hole, 1-1/2 in Conduit, For Use With: Panel Box, Steel, Silver
MFG #150KOS
27 in Stock. More available 02/15/2026
$9.04/EA
Part #MTAL 300KOS 3" (3)PIECE KNOCK-OUT SEAL Metallics Knockout Seal, 3-Piece, 3 in Hole, 3 in Conduit, For Use With: Panel Box, Steel, Silver
MFG #300KOS
14 in Stock. More available 02/15/2026
$27.56/EA
Part #MTAL 75KOS 3/4" (3)PIECE KNOCK-OUT SEAL Metallics Knockout Seal, 3-Piece, 3/4 in Hole, 3/4 in Conduit, For Use With: Panel Box, Steel, Silver
MFG #75KOS
32 in Stock. More available 02/16/2026
$6.52/EA
Part #MTAL 50KOS 1/2" (3)PIECE KNOCK-OUT SEAL Metallics Knockout Seal, 3-Piece, 1/2 in Hole, 1/2 in Conduit, For Use With: Panel Box, Steel, Silver
MFG #50KOS
Part #MTAL 150KOS 1-1/2" (3)PIECES KNOCK-OUT SEAL Metallics Knockout Seal, 3-Piece, 1-1/2 in Hole, 1-1/2 in Conduit, For Use With: Panel Box, Steel, Silver
MFG #150KOS
27 in Stock. More available 02/15/2026
$9.04/EA
Part #MTAL 300KOS 3" (3)PIECE KNOCK-OUT SEAL Metallics Knockout Seal, 3-Piece, 3 in Hole, 3 in Conduit, For Use With: Panel Box, Steel, Silver
MFG #300KOS
14 in Stock. More available 02/15/2026
$27.56/EA
Part #MTAL 75KOS 3/4" (3)PIECE KNOCK-OUT SEAL Metallics Knockout Seal, 3-Piece, 3/4 in Hole, 3/4 in Conduit, For Use With: Panel Box, Steel, Silver
MFG #75KOS
32 in Stock. More available 02/16/2026
$6.52/EA
Part #MTAL 50KOS 1/2" (3)PIECE KNOCK-OUT SEAL Metallics Knockout Seal, 3-Piece, 1/2 in Hole, 1/2 in Conduit, For Use With: Panel Box, Steel, Silver
MFG #50KOS