All Home SecurityBathroom PlumbingBreakers, Distributors, and Load CentersCommercial LightingConduits and FittingsDimmers, Switches, and Wall PlatesDoor HardwareDoor Security HardwareExtension CordsFastenersGarage LightsHome SafetyOutletsPipes, Fittings & AccessoriesPower Tool AccessoriesSafes & LockboxesStorm & Flood Prep
Sort by|
All Home SecurityBathroom PlumbingBreakers, Distributors, and Load CentersCommercial LightingConduits and FittingsDimmers, Switches, and Wall PlatesDoor HardwareDoor Security HardwareExtension CordsFastenersGarage LightsHome SafetyOutletsPipes, Fittings & AccessoriesPower Tool AccessoriesSafes & LockboxesStorm & Flood Prep
Box Knockout Plug(82)
Uses item details. Price when purchased online
KYHSHJ Recessed Flat Hidden Socket Kit with 2 * 15 Amp Stainless Steel GFCI Tamper Receptacle Outlet+3-Port RJ45 Datacom Receptacle. Internal Height Adjustable，Corrosive Resistant Hardware，Black From $45.99
Sponsored
From$4599
KYHSHJ Recessed Flat Hidden Socket Kit with 2 * 15 Amp Stainless Steel GFCI Tamper Receptacle Outlet+3-Port RJ45 Datacom Receptacle. Internal Height Adjustable，Corrosive Resistant Hardware，Black
11 out of 5 Stars. 1 reviews
Save with
1 Box 20Pcs Electrical Box Knockout Plugs Bulk Silver Metal Stainless Steel Removable Flat Round Instant Panel Knockouts Seal Plug for Conduit Closure Unused Electric Box Outlets Silver 1set $13.99
$1399
current price $13.991 Box 20Pcs Electrical Box Knockout Plugs Bulk Silver Metal Stainless Steel Removable Flat Round Instant Panel Knockouts Seal Plug for Conduit Closure Unused Electric Box Outlets Silver 1set
Manufacturer Varies Knockout Plug, Nylon, Locking Box Type 1EMR5 $14.39 Was $17.99
Now$1439
current price Now $14.39, Was $17.99$17.99
Manufacturer Varies Knockout Plug, Nylon, Locking Box Type 1EMR5
RACO Electrical Box Handy Knockout - 1/2 & 3/4 Knockouts Multicolor $20.33
$2033
current price $20.33RACO Electrical Box Handy Knockout - 1/2 & 3/4 Knockouts Multicolor
RACO 8190 Outlet Box Knockout Cable Entry 16-Knockout Steel $6.99
$699
current price $6.99RACO 8190 Outlet Box Knockout Cable Entry 16-Knockout Steel
Electrical Box,Handy,1/2 in. Knockout 680 $14.42
$1442
current price $14.42Electrical Box,Handy,1/2 in. Knockout 680
Teddico/Bwf 2504-1 Outlet Box, 2-Gang, 4-Knockout, 4-1/2 in, Metal, Gray, Powder-Coated $16.19
$1619
current price $16.19Teddico/Bwf 2504-1 Outlet Box, 2-Gang, 4-Knockout, 4-1/2 in, Metal, Gray, Powder-Coated
30 Amp Generator Inlet Box with Pre-Drilled Knockouts & NEMA L5-30P 3-Prong Twist Locking Generator Plug, Outdoor Weatherproof Heavy Duty Power Box, 125 Volts, ETL Listed$$Garden & Patio $59.98
$5998
current price $59.9830 Amp Generator Inlet Box with Pre-Drilled Knockouts & NEMA L5-30P 3-Prong Twist Locking Generator Plug, Outdoor Weatherproof Heavy Duty Power Box, 125 Volts, ETL Listed$$Garden & Patio
Thomas & Betts 1451 Knockout Plug $4.90
$490
current price $4.90Thomas & Betts 1451 Knockout Plug
1 Box 20Pcs Electrical Box Knockout Plugs Bulk Silver Metal Stainless Steel Removable Flat Round Instant Panel Knockouts Seal Plug for Conduit Closure Unused Electric Box Outlets $13.99
$1399
current price $13.991 Box 20Pcs Electrical Box Knockout Plugs Bulk Silver Metal Stainless Steel Removable Flat Round Instant Panel Knockouts Seal Plug for Conduit Closure Unused Electric Box Outlets
Teddico/Bwf 2503-1 Outlet Box, 2-Gang, 3-Knockout, 3-1/2 in, Metal, Gray, Powder-Coated $15.45
$1545
current price $15.45Teddico/Bwf 2503-1 Outlet Box, 2-Gang, 3-Knockout, 3-1/2 in, Metal, Gray, Powder-Coated
TEDDICO/BWF TGB-57V Outlet Box, 2 -Gang, 7 -Knockout, 7-1/2 in Knockout, Metal, Gray, Powder-Coated $15.92
$1592
current price $15.92TEDDICO/BWF TGB-57V Outlet Box, 2 -Gang, 7 -Knockout, 7-1/2 in Knockout, Metal, Gray, Powder-Coated
Hubbell Handy Box Single Gang Four 3/4 In. Knockouts 1-7/8 In. Deep $18.71
$1871
current price $18.71Hubbell Handy Box Single Gang Four 3/4 In. Knockouts 1-7/8 In. Deep
Hubbell 666 Knockout Combo Handy Box $8.22
$822
current price $8.22Hubbell 666 Knockout Combo Handy Box
Teddico/Bwf B75-2V Outlet Box, 1-Gang, 4-Knockout, 4-3/4 in, Metal, Gray, Powder-Coated $10.43
$1043
current price $10.43Teddico/Bwf B75-2V Outlet Box, 1-Gang, 4-Knockout, 4-3/4 in, Metal, Gray, Powder-Coated
Teddico/Bwf 3505AB-1 Outlet Box, 5-Knockout, 5-1/2 in, Metal, Bronze, Powder-Coated $11.75
$1175
current price $11.75Teddico/Bwf 3505AB-1 Outlet Box, 5-Knockout, 5-1/2 in, Metal, Bronze, Powder-Coated
Raco Knockout Plug,Conduit Size 1/2" 1042
Raco Knockout Plug,Conduit Size 1/2" 1042
Teddico/Bwf TGB-55V Outlet Box, 2-Gang, 5-Knockout, 5-1/2 in, Metal, Gray, Powder-Coated $15.69
$1569
current price $15.69Teddico/Bwf TGB-55V Outlet Box, 2-Gang, 5-Knockout, 5-1/2 in, Metal, Gray, Powder-Coated
Hubbell 4 Inch Octagon Box 167 - 2-1/8 In. Deep, Side Knockouts - Pack of 25 $132.73
$13273
current price $132.73Hubbell 4 Inch Octagon Box 167 - 2-1/8 In. Deep, Side Knockouts - Pack of 25
Peerless-av Peerless-av In-wall Metal Box With Knockout (large; Without Power Outlet) $87.36
$8736
current price $87.36Peerless-av Peerless-av In-wall Metal Box With Knockout (large; Without Power Outlet)
RACO 4" Square Electrical Box With 12 Side & 5 Bottom Knockouts - Electrical Knockout $9.12
$912
current price $9.12RACO 4" Square Electrical Box With 12 Side & 5 Bottom Knockouts - Electrical Knockout
Hubbell Knockout Combo Handy Box $8.68
$868
current price $8.68Hubbell Knockout Combo Handy Box
Teddico/Bwf B5-2V Outlet Box, 1-Gang, 4-Knockout, 4-1/2 in, Metal, Gray, Powder-Coated $15.57 Was $20.40
Now$1557
current price Now $15.57, Was $20.40$20.40
Teddico/Bwf B5-2V Outlet Box, 1-Gang, 4-Knockout, 4-1/2 in, Metal, Gray, Powder-Coated
Thomas & Betts-carlon 2Gang Knockout Box - .5 In. $28.84
$2884
current price $28.84Thomas & Betts-carlon 2Gang Knockout Box - .5 In.
Electrical Box, Handy, 1/2 in. Knockout $15.99
$1599
current price $15.99Electrical Box, Handy, 1/2 in. Knockout
RACO 1-1/2 Inch Deep Electrical Box - Side Knockouts - 25 Pack, 1/2 & 3/4 Inch $65.79
$6579
current price $65.79RACO 1-1/2 Inch Deep Electrical Box - Side Knockouts - 25 Pack, 1/2 & 3/4 Inch
Teddico/Bwf 1753W-1 Outlet Box, 1-Gang, 3-Knockout, 3-3/4 in, Metal, White, Powder-Coated $11.72
$1172
current price $11.72Teddico/Bwf 1753W-1 Outlet Box, 1-Gang, 3-Knockout, 3-3/4 in, Metal, White, Powder-Coated
TEDDICO/BWF TGB-75V Outlet Box, 2 -Gang, 3 -Knockout, 3-3/4 in Knockout, Metal, Gray, Powder-Coated $16.04
$1604
current price $16.04TEDDICO/BWF TGB-75V Outlet Box, 2 -Gang, 3 -Knockout, 3-3/4 in Knockout, Metal, Gray, Powder-Coated
Teddico/Bwf 2504W-1 Outlet Box, 2-Gang, 4-Knockout, 4-1/2 in, Metal, White, Powder-Coated $17.96
$1796
current price $17.96Teddico/Bwf 2504W-1 Outlet Box, 2-Gang, 4-Knockout, 4-1/2 in, Metal, White, Powder-Coated
Teddico/Bwf TGB-54V Outlet Box, 2-Gang, 4-Knockout, 4-1/2 in, Metal, Gray, Powder-Coated $15.69
$1569
current price $15.69Teddico/Bwf TGB-54V Outlet Box, 2-Gang, 4-Knockout, 4-1/2 in, Metal, Gray, Powder-Coated
Teddico/Bwf 1504AB-1 Outlet Box, 1-Gang, 4-Knockout, 4-1/2 in, Metal, Bronze, Powder-Coated $11.98
$1198
current price $11.98Teddico/Bwf 1504AB-1 Outlet Box, 1-Gang, 4-Knockout, 4-1/2 in, Metal, Bronze, Powder-Coated
Raco Electrical Box,Handy,1/2 in. Knockout 681 $15.03
$1503
current price $15.03Raco Electrical Box,Handy,1/2 in. Knockout 681
Electrical Box, Handy, 1/2" Knockout $15.34
$1534
current price $15.34Electrical Box, Handy, 1/2" Knockout
4Pack 60mm/2.36" Plastic Hole Plugs Panel Flush Type Knockout Locking Plugs, Red $8.99
$899
current price $8.994Pack 60mm/2.36" Plastic Hole Plugs Panel Flush Type Knockout Locking Plugs, Red
Teddico/Bwf 1754W-1 Outlet Box, 1-Gang, 4-Knockout, 4-3/4 in, Metal, Bronze, Powder-Coated $12.31
$1231
current price $12.31Teddico/Bwf 1754W-1 Outlet Box, 1-Gang, 4-Knockout, 4-3/4 in, Metal, Bronze, Powder-Coated
Southwire 2-1/8 In. x 4 In. x 2-1/8 In. 10-Knockout Handy Box G19282-AB58-UPC $14.99
$1499
current price $14.99Southwire 2-1/8 In. x 4 In. x 2-1/8 In. 10-Knockout Handy Box G19282-AB58-UPC
10Pack 40mm/1.57" Plastic Hole Plugs Panel Flush Type Knockout Locking Plugs, Red $9.09
$909
current price $9.0910Pack 40mm/1.57" Plastic Hole Plugs Panel Flush Type Knockout Locking Plugs, Red
Uxcell 66Pack 3/8" Plastic Hole Plugs Panel Flush Type Knockout Locking Plugs, White From $7.29
From$729
Uxcell 66Pack 3/8" Plastic Hole Plugs Panel Flush Type Knockout Locking Plugs, White
15 out of 5 Stars. 1 reviews
Teddico/Bwf 1753-1 Outlet Box, 1-Gang, 3-Knockout, 3-3/4 in, Metal, Gray, Powder-Coated $14.06
$1406
current price $14.06Teddico/Bwf 1753-1 Outlet Box, 1-Gang, 3-Knockout, 3-3/4 in, Metal, Gray, Powder-Coated
2" Plastic Knockout Test Plug $6.30
$630
current price $6.302" Plastic Knockout Test Plug
Hubbell Electrical 4" Square Box With Bracket - TKO Knockout - Multicolor $15.43
$1543
current price $15.43Hubbell Electrical 4" Square Box With Bracket - TKO Knockout - Multicolor
Other options to consider(63)
Popular in Box Knockout Plug
Related Products
Square D by Schneider Electric QOC24UF 24-Space Load Center Flush Cover
Square D by Schneider Electric QOC24UF 24-Space Load Center Flush Cover$39.92current price $39.92Raco Electrical Box, Galvanized Zinc, 1-1/2 Nominal Depth, 2 Nominal Width, 3 Nominal Length - 410-Pack of 10
Raco Electrical Box, Galvanized Zinc, 1-1/2 Nominal Depth, 2 Nominal Width, 3 Nominal Length - 410-Pack of 10$54.48current price $54.48Raco Electrical Box,Octagon,4 X 4 in. 127
Raco Electrical Box,Octagon,4 X 4 in. 127$8.99current price $8.99Thomas & Betts B121ADJH Single Gang Horizontal Adjust A Box
Thomas & Betts B121ADJH Single Gang Horizontal Adjust A Box$27.22current price $27.22Hubbell-Raco 724 4" Octagon/Round Box Cover, 1 1/2" Knockout, Drawn, Metallic
Hubbell-Raco 724 4" Octagon/Round Box Cover, 1 1/2" Knockout, Drawn, Metallic$7.19current price $7.19Arlington Industries Whit 1 Gang Low Profile Electrical Box with Weatherproof Cover
Arlington Industries Whit 1 Gang Low Profile Electrical Box with Weatherproof Cover$33.33current price $33.33Raco Electrical Box, Galvanized Steel, 1-1/2 Nominal Depth, 4 Nominal Width, 4 Nominal Length - 296-1-Pack of 2
Raco Electrical Box, Galvanized Steel, 1-1/2 Nominal Depth, 4 Nominal Width, 4 Nominal Length - 296-1-Pack of 2$31.80current price $31.80Arlington FLBR5420 Recessed Power and Data Round Floor Box (Antique Bronze)
Arlington FLBR5420 Recessed Power and Data Round Floor Box (Antique Bronze)$80.44current price $80.44Square D by Schneider Electric QOC42UF 42-Space Load Center Flush Cover
Square D by Schneider Electric QOC42UF 42-Space Load Center Flush Cover$71.71current price $71.71Electrical Box, Switch, 3X2X2-1/2 in.
Electrical Box, Switch, 3X2X2-1/2 in.$15.41current price $15.41Raco Electrical Box Octagon With Ceiling Fan Support - Galvanized Steel - 2 Pack
Raco Electrical Box Octagon With Ceiling Fan Support - Galvanized Steel - 2 Pack$14.01current price $14.01& Betts/Carlon A420RR Cover RSD Box Electrical 2G Nonmetal
& Betts/Carlon A420RR Cover RSD Box Electrical 2G Nonmetal$17.91current price $17.91Arlington - Dri-Box Adapters with Non-Metallic Cover and Base - Vertical - Single Gang - Clear - DBPV1C
Arlington - Dri-Box Adapters with Non-Metallic Cover and Base - Vertical - Single Gang - Clear - DBPV1C$9.63current price $9.63Thomas & Betts Fn23 Electrical Outlet Box 1 Gang
Thomas & Betts Fn23 Electrical Outlet Box 1 Gang$18.46current price $18.46Schneider Electric Homeline Main Lug Load Center - 125A 8-Space 16-Circuit Indoor
Schneider Electric Homeline Main Lug Load Center - 125A 8-Space 16-Circuit Indoor$74.27current price $74.27Wiremold GFCI Box Fitting,Ivory,Steel V5744
Wiremold GFCI Box Fitting,Ivory,Steel V5744$30.74current price $30.74Carlon HB1DP Duplex Handy Box Cover, PVC - Quantity 25
Carlon HB1DP Duplex Handy Box Cover, PVC - Quantity 25$50.37current price $50.37