Box Covers

Electrical boxes and covers: new work, old work and slider boxes in PVC, fiberglass, polycarbonate and thermoplastic, 1 and 2 gang, round ceiling and fan boxes, box extensions, ring covers and outlet box covers.

Box size is set by conductor fill rather than by what fits the opening — count conductors, devices and clamps and pick the cubic inch rating that covers them. Fan boxes have to be rated and braced for the load they carry.

Sigma Engineered Solutions New Work 9.5 cu in Rectangle Metallic Extension Ring Gray

Sigma Engineered Solutions New Work 9.5 cu in Rectangle Metallic Extension Ring Gray

Regular price $3.31 USD

Regular price Sale price $3.31 USD
Unit price per
Sigma Engineered Solutions ProConnex 2.5 in. L Cable Protector Plate 2 pk

Sigma Engineered Solutions ProConnex 2.5 in. L Cable Protector Plate 2 pk

Regular price $0.72 USD

Regular price Sale price $0.72 USD
Unit price per
Sigma Engineered Solutions ProConnex Round Zinc-Plated Steel .37 in. H X 1/2 in. W Knockout Seal

Sigma Engineered Solutions ProConnex Round Zinc-Plated Steel .37 in. H X 1/2 in. W Knockout Seal

Regular price $0.33 USD

Regular price Sale price $0.33 USD
Unit price per
Sigma Engineered Solutions ProConnex Round Zinc-Plated Steel .40 in. H X 3/4 in. W Knockout Seal

Sigma Engineered Solutions ProConnex Round Zinc-Plated Steel .40 in. H X 3/4 in. W Knockout Seal

Regular price $0.35 USD

Regular price Sale price $0.35 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 2.83 in. H X 4.57 in. W Horizontal Duplex

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 2.83 in. H X 4.57 in. W Horizontal Duplex

Regular price $2.91 USD

Regular price Sale price $2.91 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 2.83 in. H X 4.57 in. W Horizontal GFCI C — Bronze

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 2.83 in. H X 4.57 in. W Horizontal GFCI C — Bronze

Regular price $3.36 USD

Regular price Sale price $3.36 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 2.83 in. H X 4.57 in. W Horizontal GFCI C — White

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 2.83 in. H X 4.57 in. W Horizontal GFCI C — White

Regular price $3.49 USD

Regular price Sale price $3.49 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.81 in. W Universal Cover — Bronze

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.81 in. W Universal Cover — Bronze

Regular price $4.49 USD

Regular price Sale price $4.49 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.81 in. W Universal Cover — White

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.81 in. W Universal Cover — White

Regular price $4.48 USD

Regular price Sale price $4.48 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.83 in. W 30/50 Amp Recepta

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.83 in. W 30/50 Amp Recepta

Regular price $4.11 USD

Regular price Sale price $4.11 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.83 in. W Toggle Switch and

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.83 in. W Toggle Switch and

Regular price $7.51 USD

Regular price Sale price $7.51 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.83 in. W Vertical Duplex C

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.83 in. W Vertical Duplex C

Regular price $3.24 USD

Regular price Sale price $3.24 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.83 in. W Vertical GFCI Cov — Bronze

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.83 in. W Vertical GFCI Cov — Bronze

Regular price $3.32 USD

Regular price Sale price $3.32 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.83 in. W Vertical GFCI Cov — White

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.57 in. H X 2.83 in. W Vertical GFCI Cov — White

Regular price $3.29 USD

Regular price Sale price $3.29 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.61 in. H X 2.85 in. W Lampholder Cover

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.61 in. H X 2.85 in. W Lampholder Cover

Regular price $2.96 USD

Regular price Sale price $2.96 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.61 in. H X 2.85 in. W Lampholder Cover

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.61 in. H X 2.85 in. W Lampholder Cover

Regular price $2.55 USD

Regular price Sale price $2.55 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.61 in. H X 2.85 in. W Lampholder Cover

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.61 in. H X 2.85 in. W Lampholder Cover

Regular price $2.99 USD

Regular price Sale price $2.99 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.61 in. H X 2.85 in. W Lampholder Cover

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.61 in. H X 2.85 in. W Lampholder Cover

Regular price $2.99 USD

Regular price Sale price $2.99 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.61 in. H X 2.85 in. W Lampholder Cover

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.61 in. H X 2.85 in. W Lampholder Cover

Regular price $2.67 USD

Regular price Sale price $2.67 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.61 in. H X 2.85 in. W Lampholder Cover

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.61 in. H X 2.85 in. W Lampholder Cover

Regular price $2.67 USD

Regular price Sale price $2.67 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.76 in. H X 3.01 in. W Multi-Use Cover

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.76 in. H X 3.01 in. W Multi-Use Cover

Regular price $5.07 USD

Regular price Sale price $5.07 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.76 in. H X 3.01 in. W Multi-Use Cover

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.76 in. H X 3.01 in. W Multi-Use Cover

Regular price $5.31 USD

Regular price Sale price $5.31 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.76 in. H X 3.01 in. W Multi-Use Cover

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.76 in. H X 3.01 in. W Multi-Use Cover

Regular price $5.29 USD

Regular price Sale price $5.29 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.76 in. H X 3.01 in. W Multi-Use Cover

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.76 in. H X 3.01 in. W Multi-Use Cover

Regular price $5.29 USD

Regular price Sale price $5.29 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.76 in. H X 3.01 in. W Multi-Use Cover

Sigma Engineered Solutions Rectangle Die-Cast Metal 1 gang 4.76 in. H X 3.01 in. W Multi-Use Cover

Regular price $5.29 USD

Regular price Sale price $5.29 USD
Unit price per
Sigma Engineered Solutions Rectangle Die-Cast Metal 4.76 in. H X 3.01 in. W Multi-Use Cover — Model 14145

Sigma Engineered Solutions Rectangle Die-Cast Metal 4.76 in. H X 3.01 in. W Multi-Use Cover — Model 14145

Regular price $5.05 USD

Regular price Sale price $5.05 USD
Unit price per
Sigma Engineered Solutions Rectangle Plastic 1 gang 4.63 in. H X 2.87 in. W Flat Box Cover

Sigma Engineered Solutions Rectangle Plastic 1 gang 4.63 in. H X 2.87 in. W Flat Box Cover

Regular price $1.77 USD

Regular price Sale price $1.77 USD
Unit price per
Sigma Engineered Solutions Rectangle Plastic 1 gang 4.63 in. H X 2.87 in. W Flat Box Cover

Sigma Engineered Solutions Rectangle Plastic 1 gang 4.63 in. H X 2.87 in. W Flat Box Cover

Regular price $1.77 USD

Regular price Sale price $1.77 USD
Unit price per
Sigma Engineered Solutions Rectangle Plastic 1 gang 4.76 in. H X 3.01 in. W Toggle Switch Cover

Sigma Engineered Solutions Rectangle Plastic 1 gang 4.76 in. H X 3.01 in. W Toggle Switch Cover

Regular price $3.55 USD

Regular price Sale price $3.55 USD
Unit price per
Sigma Engineered Solutions Rectangle Plastic 1 gang 4.76 in. H X 3.01 in. W Universal Cover

Sigma Engineered Solutions Rectangle Plastic 1 gang 4.76 in. H X 3.01 in. W Universal Cover

Regular price $4.27 USD

Regular price Sale price $4.27 USD
Unit price per
Sigma Engineered Solutions Rectangle Plastic 1 gang 4.76 in. H X 3.01 in. W Universal Cover

Sigma Engineered Solutions Rectangle Plastic 1 gang 4.76 in. H X 3.01 in. W Universal Cover

Regular price $4.27 USD

Regular price Sale price $4.27 USD
Unit price per
Sigma Engineered Solutions Rectangle Plastic 1 gang 5.98 in. H X 4.02 in. W Weatherproof Cover

Sigma Engineered Solutions Rectangle Plastic 1 gang 5.98 in. H X 4.02 in. W Weatherproof Cover

Regular price $8.73 USD

Regular price Sale price $8.73 USD
Unit price per
Sigma Engineered Solutions Rectangle Stamped Steel 1 gang 4.52 in. H X 2.77 in. W Flat Box Cover

Sigma Engineered Solutions Rectangle Stamped Steel 1 gang 4.52 in. H X 2.77 in. W Flat Box Cover

Regular price $1.05 USD

Regular price Sale price $1.05 USD
Unit price per
Sigma Engineered Solutions Round Die-Cast Metal 4.13 in. H X 4.13 in. W Lampholder Cover

Sigma Engineered Solutions Round Die-Cast Metal 4.13 in. H X 4.13 in. W Lampholder Cover

Regular price $2.87 USD

Regular price Sale price $2.87 USD
Unit price per
Sigma Engineered Solutions Round Die-Cast Metal 4.13 in. H X 4.13 in. W Lampholder Cover

Sigma Engineered Solutions Round Die-Cast Metal 4.13 in. H X 4.13 in. W Lampholder Cover

Regular price $2.41 USD

Regular price Sale price $2.41 USD
Unit price per
Sigma Engineered Solutions Round Die-Cast Metal 4.13 in. H X 4.13 in. W Lampholder Cover

Sigma Engineered Solutions Round Die-Cast Metal 4.13 in. H X 4.13 in. W Lampholder Cover

Regular price $2.87 USD

Regular price Sale price $2.87 USD
Unit price per