Knockout Closers
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Part #RACO 1040 3-1/2" HOLESEAL 2 PIECE STEEL RACO® Knockout Seal, 2-Piece, For Use With: Box/Panelboard, 3-1/2 in Trade Size, Steel, Electro-Plated Zinc, Silver, 4-3/8 in W x 5/8 in D
MFG #1040
34 in Stock. More available 12/19/2025
$2425.90 per C (100) / EA
Part #RACO 1039 3" HOLESEAL (2)PIECE STEEL RACO® Knockout Seal, 2-Piece, For Use With: Box/Panelboard, 3 in Trade Size, Steel, Electro-Plated Zinc, Silver, 3-13/16 in W x 5/8 in D
MFG #1039
58 in Stock. More available 12/19/2025
$1930.00 per C (100) / EA
Part #RACO 1041 4" HOLESEAL (2)PIECE STEEL RACO® Knockout Seal, 2-Piece, For Use With: Box/Panelboard, 4 in Trade Size, Steel, Electro-Plated Zinc, Silver, 4-29/32 in W x 5/8 in D
MFG #1041
47 in Stock. More available 12/19/2025
$3008.00 per C (100) / EA
Part #RACO 1037 2-1/2" HOLESEAL (2)PIECE STEEL RACO® Knockout Seal, 2-Piece, Steel, Electro-Plated Zinc, 0.625 in L x 3.188 in W x 3.188 in H
MFG #1037
68 in Stock. More available 12/07/2025 and 12/24/2025
$1531.10 per C (100) / EA
Part #RACO 1040 3-1/2" HOLESEAL 2 PIECE STEEL RACO® Knockout Seal, 2-Piece, For Use With: Box/Panelboard, 3-1/2 in Trade Size, Steel, Electro-Plated Zinc, Silver, 4-3/8 in W x 5/8 in D
MFG #1040
34 in Stock. More available 12/19/2025
$2425.90 per C (100) / EA
Part #RACO 1039 3" HOLESEAL (2)PIECE STEEL RACO® Knockout Seal, 2-Piece, For Use With: Box/Panelboard, 3 in Trade Size, Steel, Electro-Plated Zinc, Silver, 3-13/16 in W x 5/8 in D
MFG #1039
58 in Stock. More available 12/19/2025
$1930.00 per C (100) / EA
Part #RACO 1041 4" HOLESEAL (2)PIECE STEEL RACO® Knockout Seal, 2-Piece, For Use With: Box/Panelboard, 4 in Trade Size, Steel, Electro-Plated Zinc, Silver, 4-29/32 in W x 5/8 in D
MFG #1041
47 in Stock. More available 12/19/2025
$3008.00 per C (100) / EA
Part #RACO 1037 2-1/2" HOLESEAL (2)PIECE STEEL RACO® Knockout Seal, 2-Piece, Steel, Electro-Plated Zinc, 0.625 in L x 3.188 in W x 3.188 in H
MFG #1037
68 in Stock. More available 12/07/2025 and 12/24/2025
$1531.10 per C (100) / EA






