Knockout Closers
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Part #GB KO708 3" HOLESEAL 10/BX Gardner Bender, KO708, Knockout Seal, Bolt-On, 3 in Hole, 3 in Conduit, For Use With: Box Knockout, Steel, Galvanized, Silver
MFG #KO708
68 in Stock. More available 07/08/2026
$11.09/EA
Part #MULB 40115 1-1/2" KNOCKOUT CLOSER SNAP-IN STEEL Mulberry Knockout Seal, Closed, 1-1/2 in Size, Snap-In Mounting, Steel, Bright Zinc Plated
MFG #40115
248 in Stock. More available 07/01/2026
$1.43/EA
Part #MULB 40116 2" KNOCKOUT CLOSER SNAP IN-STEEL Mulberry Knockout Seal, Closed, 2 in Size, Snap-In Mounting, Steel, Bright Zinc Plated
MFG #40116
231 in Stock. More available 06/22/2026 and 07/01/2026
$1.74/EA
Part #MULB 40114 1-1/4" KNOCKOUT CLOSER SNAP-IN STEEL Mulberry Knockout Seal, Closed, 1-1/4 in Size, Snap-In Mounting, Steel, Bright Zinc Plated
MFG #40114
433 in Stock. More available 07/01/2026
$0.83/EA
Part #MULB 40112 3/4" KNOCKOUT CLOSER SNAP-IN STEEL 56254 Mulberry Knockout Seal, Closed, 3/4 in Size, Snap-In Mounting, Steel, Bright Zinc Plated
MFG #40112
3594 in Stock. More available 07/01/2026
$0.42/EA
Part #MULB 40111 1/2" KNOCKOUT CLOSER SNAP-IN STEEL Mulberry Knockout Seal, Closed, 1/2 in Size, Snap-In Mounting, Steel, Bright Zinc Plated
MFG #40111
4643 in Stock. More available 07/01/2026
$0.40/EA
Part #MULB 40113 1" KNOCKOUT CLOSER SNAP-IN STEEL Mulberry Knockout Seal, Closed, 1 in Size, Snap-In Mounting, Steel, Bright Zinc Plated
MFG #40113
1026 in Stock. More available 07/01/2026
$0.68/EA
Part #TB 1451 1/2" KNOCKOUT PLUG GRAY PLASTIC T&B® Industrial Fitting Knockout Locking Plug, Non-Metallic, 1/2 in Size, For Use With: Rigid/IMC Conduit, Snap-In Mounting, Thermoplastic, 1.06 in Dia Dimensions
MFG #1451
196 in Stock. More available 07/03/2026
$2.81/EA
Part #GB KO701 1/2" HOLESEAL 100/BX KNOCKOUT SEAL Gardner Bender, KO701, Knockout Seal, Bolt-On, 1/2 in Hole, 1/2 in Conduit, For Use With: Box Knockout, Steel, Galvanized, Silver
MFG #KO701
609 in Stock. More available 07/08/2026
$1.64/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
30 in Stock. More available 07/11/2026
$25.47/EA
Part #GB KO703 1" HOLESEAL 25/BX Gardner Bender, KO703, Knockout Seal, Bolt-On, 1 in Hole, 1 in Conduit, For Use With: Box Knockout, Steel, Galvanized, Silver
MFG #KO703
117 in Stock. More available 07/08/2026
$3.10/EA
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
32 in Stock. More available 07/05/2026
$9.58/EA
Part #TB 1453 1" KNOCKOUT PLUG GRAY PLASTIC T&B® Industrial Fitting Knockout Locking Plug, Non-Metallic, 1 in Size, For Use With: Rigid/IMC Conduit, Snap-In Mounting, Thermoplastic, 1.59 in Dia Dimensions
MFG #1453
6 in Stock. More available 07/06/2026
$6.24/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
14 in Stock. More available 07/06/2026
$6.92/EA
Part #GB KO707 2-1/2" HOLESEAL 10/BX Gardner Bender, KO707, Knockout Seal, Bolt-On, 2-1/2 in Hole, 2-1/2 in Conduit, For Use With: Box Knockout, Steel, Galvanized, Silver
MFG #KO707
25 in Stock. More available 06/24/2026 and 07/09/2026
$9.15/EA
Part #TB 5710 1/2" KNOCKOUT PLUG NEOPRENE NEMA3R -4 -6 -13 T&B® Industrial Fitting Liquid Tight Knockout Plug, 1/2 in Size, For Use With: Liquid Tight Flexible Metal Conduit Fitting, Snap-In Mounting, Neoprene, 1-9/32 in Dia Dimensions
MFG #5710
46 in Stock. More available 07/03/2026
$10.57/EA
Part #GB KO704 1-1/4" HOLESEAL 25/BX Gardner Bender, KO704, Knockout Seal, Bolt-On, 1-1/4 in Hole, 1-1/4 in Conduit, For Use With: Box Knockout, Steel, Galvanized, Silver
MFG #KO704
34 in Stock. More available 07/08/2026
$4.01/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
50 in Stock. More available 07/11/2026
$31.58/EA
Part #GB KO705 1-1/2" HOLESEAL 10/BX Gardner Bender, KO705, Knockout Seal, Bolt-On, 1-1/2 in Hole, 1-1/2 in Conduit, For Use With: Box Knockout, Steel, Galvanized, Silver
MFG #KO705
32 in Stock. More available 07/08/2026
$6.20/EA
Part #GB KO706 2" HOLESEAL 10/BX Gardner Bender Knockout Seal, For Use With: Unused Box Knockout, 2 in OD, Steel, Galvanized
MFG #KO706
76 in Stock. More available 07/08/2026
$7.70/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
7 in Stock. More available 06/30/2026 and 07/05/2026
$29.21/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
51 in Stock. More available 07/10/2026 and 07/11/2026
$20.27/EA
Part #GB KO702 3/4" HOLESEAL 50/BX Gardner Bender Knockout Seal, 3/4 in, For Use With: Unused Box Knockout, Steel, Galvanized
MFG #KO702
146 in Stock. More available 07/08/2026
$2.14/EA
Part #SWCOMP H4471 4"X2" RECT BOX 1-1/2" DEEP 1/2" KO Southwire - Topaz Drawn Handy Box, (8) Side/(2) Bottom Knockouts, 1/2 in Knockout, Rectangle Shape, 11.5 cu-in Capacity, Steel, Galvanized, 2 in W x 2-1/8 in D x 4 in H Dimensions
MFG #H4471
550 in Stock. More available 07/06/2026
$6.97/EA
Part #GB KO708 3" HOLESEAL 10/BX Gardner Bender, KO708, Knockout Seal, Bolt-On, 3 in Hole, 3 in Conduit, For Use With: Box Knockout, Steel, Galvanized, Silver
MFG #KO708
68 in Stock. More available 07/08/2026
$11.09/EA
Part #MULB 40115 1-1/2" KNOCKOUT CLOSER SNAP-IN STEEL Mulberry Knockout Seal, Closed, 1-1/2 in Size, Snap-In Mounting, Steel, Bright Zinc Plated
MFG #40115
248 in Stock. More available 07/01/2026
$1.43/EA
Part #MULB 40116 2" KNOCKOUT CLOSER SNAP IN-STEEL Mulberry Knockout Seal, Closed, 2 in Size, Snap-In Mounting, Steel, Bright Zinc Plated
MFG #40116
231 in Stock. More available 06/22/2026 and 07/01/2026
$1.74/EA
Part #MULB 40114 1-1/4" KNOCKOUT CLOSER SNAP-IN STEEL Mulberry Knockout Seal, Closed, 1-1/4 in Size, Snap-In Mounting, Steel, Bright Zinc Plated
MFG #40114
433 in Stock. More available 07/01/2026
$0.83/EA
Part #MULB 40112 3/4" KNOCKOUT CLOSER SNAP-IN STEEL 56254 Mulberry Knockout Seal, Closed, 3/4 in Size, Snap-In Mounting, Steel, Bright Zinc Plated
MFG #40112
3594 in Stock. More available 07/01/2026
$0.42/EA
Part #MULB 40111 1/2" KNOCKOUT CLOSER SNAP-IN STEEL Mulberry Knockout Seal, Closed, 1/2 in Size, Snap-In Mounting, Steel, Bright Zinc Plated
MFG #40111
4643 in Stock. More available 07/01/2026
$0.40/EA
Part #MULB 40113 1" KNOCKOUT CLOSER SNAP-IN STEEL Mulberry Knockout Seal, Closed, 1 in Size, Snap-In Mounting, Steel, Bright Zinc Plated
MFG #40113
1026 in Stock. More available 07/01/2026
$0.68/EA
Part #TB 1451 1/2" KNOCKOUT PLUG GRAY PLASTIC T&B® Industrial Fitting Knockout Locking Plug, Non-Metallic, 1/2 in Size, For Use With: Rigid/IMC Conduit, Snap-In Mounting, Thermoplastic, 1.06 in Dia Dimensions
MFG #1451
196 in Stock. More available 07/03/2026
$2.81/EA
Part #GB KO701 1/2" HOLESEAL 100/BX KNOCKOUT SEAL Gardner Bender, KO701, Knockout Seal, Bolt-On, 1/2 in Hole, 1/2 in Conduit, For Use With: Box Knockout, Steel, Galvanized, Silver
MFG #KO701
609 in Stock. More available 07/08/2026
$1.64/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
30 in Stock. More available 07/11/2026
$25.47/EA
Part #GB KO703 1" HOLESEAL 25/BX Gardner Bender, KO703, Knockout Seal, Bolt-On, 1 in Hole, 1 in Conduit, For Use With: Box Knockout, Steel, Galvanized, Silver
MFG #KO703
117 in Stock. More available 07/08/2026
$3.10/EA
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
32 in Stock. More available 07/05/2026
$9.58/EA
Part #TB 1453 1" KNOCKOUT PLUG GRAY PLASTIC T&B® Industrial Fitting Knockout Locking Plug, Non-Metallic, 1 in Size, For Use With: Rigid/IMC Conduit, Snap-In Mounting, Thermoplastic, 1.59 in Dia Dimensions
MFG #1453
6 in Stock. More available 07/06/2026
$6.24/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
14 in Stock. More available 07/06/2026
$6.92/EA
Part #GB KO707 2-1/2" HOLESEAL 10/BX Gardner Bender, KO707, Knockout Seal, Bolt-On, 2-1/2 in Hole, 2-1/2 in Conduit, For Use With: Box Knockout, Steel, Galvanized, Silver
MFG #KO707
25 in Stock. More available 06/24/2026 and 07/09/2026
$9.15/EA
Part #TB 5710 1/2" KNOCKOUT PLUG NEOPRENE NEMA3R -4 -6 -13 T&B® Industrial Fitting Liquid Tight Knockout Plug, 1/2 in Size, For Use With: Liquid Tight Flexible Metal Conduit Fitting, Snap-In Mounting, Neoprene, 1-9/32 in Dia Dimensions
MFG #5710
46 in Stock. More available 07/03/2026
$10.57/EA
Part #GB KO704 1-1/4" HOLESEAL 25/BX Gardner Bender, KO704, Knockout Seal, Bolt-On, 1-1/4 in Hole, 1-1/4 in Conduit, For Use With: Box Knockout, Steel, Galvanized, Silver
MFG #KO704
34 in Stock. More available 07/08/2026
$4.01/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
50 in Stock. More available 07/11/2026
$31.58/EA
Part #GB KO705 1-1/2" HOLESEAL 10/BX Gardner Bender, KO705, Knockout Seal, Bolt-On, 1-1/2 in Hole, 1-1/2 in Conduit, For Use With: Box Knockout, Steel, Galvanized, Silver
MFG #KO705
32 in Stock. More available 07/08/2026
$6.20/EA
Part #GB KO706 2" HOLESEAL 10/BX Gardner Bender Knockout Seal, For Use With: Unused Box Knockout, 2 in OD, Steel, Galvanized
MFG #KO706
76 in Stock. More available 07/08/2026
$7.70/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
7 in Stock. More available 06/30/2026 and 07/05/2026
$29.21/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
51 in Stock. More available 07/10/2026 and 07/11/2026
$20.27/EA
Part #GB KO702 3/4" HOLESEAL 50/BX Gardner Bender Knockout Seal, 3/4 in, For Use With: Unused Box Knockout, Steel, Galvanized
MFG #KO702
146 in Stock. More available 07/08/2026
$2.14/EA
Part #SWCOMP H4471 4"X2" RECT BOX 1-1/2" DEEP 1/2" KO Southwire - Topaz Drawn Handy Box, (8) Side/(2) Bottom Knockouts, 1/2 in Knockout, Rectangle Shape, 11.5 cu-in Capacity, Steel, Galvanized, 2 in W x 2-1/8 in D x 4 in H Dimensions
MFG #H4471
550 in Stock. More available 07/06/2026
$6.97/EA