MarketsCastingsStampingSourcing SolutionsAbout UsWhy Sigma
Electrical
Electrical

An extensive range of robust fittings and weatherproof products.

Automotive
Automotive

Connectivity solutions such as high brackets, busbars, and connector pins.

Power Transmission & Distribution
Power Transmission & Distribution

Connectors & structural components for cutouts, transformers, & substations.

Aerospace
Aerospace

Complex sensor housings & fracture-critical products.

Appliances
Appliances

Robust castings and assemblies for everyday appliances.

Commercial Hardware
Commercial Hardware

Finished components for commercial & residential hardware applications.

Electronics & Telecom
Electronics & Telecom

Precision metal stamped sensors, connectors and cast housings & covers.

Fluid Power
Fluid Power

Durable, precision products for high-pressure applications.

Food & Beverage
Food & Beverage

Handles, leveling pins, flow valves & button housings.

Lighting
Lighting

Custom housings to fully assembled commercial & industrial light fixtures.

Marine
Marine

Durable corrosion-resistant engineered castings and subassemblies.

Medical & Dental
Medical & Dental

Medical-grade parts for implants, housings, manifolds, and pumps.

Oil & Gas
Oil & Gas

Custom housings and covers for flow control, pressure valves & meters.

Power Tools
Power Tools

Durable yet lightweight custom metal housings.

Energy
Energy

Innovative precision metal stamped parts.

High Pressure Die Casting
High Pressure Die Casting

High-pressure liquid metal is pressed into a precision metal mold cavity, and then cooled & solidified under pressure.

Ideal for a wide range of applications, including automotive, agricultural, electronics, and medical.

Sand Casting
Sand Casting

Castings with complex shapes & inner cavities that are produced in a sand mold

Ideal for parts with complex shapes and inner cavities

Gravity Die Casting
Gravity Die Casting

A mold is filled with liquid metal using gravity and cooled and solidified in the mold to obtain a casting

Ideal for parts with complex shapes made with steel, aluminum or magnesium alloys

Investment Casting
Investment Casting

A process used to obtain a mold without a parting surface; creates parts with high dimensional & geometric accuracy

Ideal for near-net shaped parts with complex shapes and high precision requirements

Partner Services
Partner Services

Custom Tooling, Machining, Surface Finishing, Special Purpose Machine Design & Development

Precision Metal Stamping
Precision Metal Stamping

More than 80 presses convert metal sheets into custom parts

Ideal for parts for electronic connectors and microprocessor chips

Swiss CNC Machining
Swiss CNC Machining

A specialized CNC machine capable of producing extremely small, precise parts

Ideal for complex miniature screws, contact pins & micro-fasteners

Partner Services
Partner Services

Rapid Prototypes, Heat Treating, Automated Assembly

Company History
Company History

Learn more about our company milestones.

Plant Locations
Plant Locations

Learn more about our global manufacturing facilities.

Company News
Company News

See our company announcements and press releases.

Contact Us
Contact Us

Let us know how we can help create a solution for you

Resources
Resources

Download catalogs and key product guides.

Global Code of Conduct
Global Code of Conduct

Download our Code of Conduct and report violations.

Innovation at Sigma
Innovation at Sigma

Purposeful innovation – the continual improvement and innovation of custom-designed and precision-made products and solutions.

Engineered Solutions
Engineered Solutions

Sigma offers solutions for complex product characteristics and technical requirements.

Global Supply Chain Management
Global Supply Chain Management

U.S.-based supply chain management teams support our customers.

Partner Services
Partner Services

Sigma is a vertically integrated single-source solution provider.

Sustainability at Sigma
Sustainability at Sigma

Our commitment to excellence drives us to build a better, more sustainable future in all aspects of our operations.

Safety at Sigma
Safety at Sigma

Safety is more than just a priority at Sigma Engineered Solutions – it’s a core value.

Connection Type: Lampholder

< Products

Round Cover with Three 1/2″ Holes

Material: Stamped Steel
Category: Weatherproof
Sub Category: Cover
Type(s): Round
Connection Type(s): ClusterLampholder

Three hole cluster covers are used to provide a mounting location for up to three lampholders to a 4″ round weatherproof box.

  • With three 1/2″ threaded knockouts
  • Includes gasket, hardware and closure plugs
Color
Color Model Number
Bronze GC7053A1
Black GC7053B1
Gray GC7053G1
White GC7053W1
AB
4.131.04
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
65!
WARNING:
Risk of cancer and reproductive harm from exposure to Lead.
See www.P65Warnings.ca.gov
< Products

Round Lampholder Cover with Three 1/2″ Holes

Material: Non-Metallic
Category: Weatherproof
Sub Category: Cover
Type(s): Round
Connection Type(s): ClusterLampholder

Three hole cluster covers are used to provide a mounting location for up to three lampholders to a 4″ round weatherproof box.

  • With three 1/2″ threaded knockouts
  • Includes gasket, hardware and closure plugs
Color
Color Model Number
Gray GC7053PG1
White GC7053PW1
AB
4.51.17
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
< Products

One-Gang Lampholder Cover with Three 1/2″ Holes

Material: Non-Metallic
Category: Weatherproof
Sub Category: Cover
Type(s): 1-Gang
Connection Type(s): ClusterLampholder

Three hole cluster covers are used to provide a mounting location for up to three lampholders to a one-gang weatherproof box.

  • With three 1/2″ threaded knockouts
  • Includes gasket, hardware and closure plugs
Color
Color Model Number
Gray GC1053PG1
White GC1053PW1
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
< Products

Round Cover with One 1/2″ Hole

Material: Stamped Steel
Category: Weatherproof
Sub Category: Cover
Type(s): Round
Connection Type(s): ClusterLampholder

One hole cluster covers are used to provide a mounting location for a single lampholder to a 4″ round weatherproof box.

  • With one 1/2″ threaded knockout
  • Includes gasket and hardware
Color
Color Model Number
Bronze GC7051A1
Black GC7051B1
Gray GC7051G1
Unpainted GC7051U1
White GC7051W1
AB
4.130.57
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
65!
WARNING:
Risk of cancer and reproductive harm from exposure to Lead.
See www.P65Warnings.ca.gov
< Products

Round Lamp Holder Covers

Material: Stamped Steel
Category: Weatherproof
Sub Category: Cover
Type(s): Round
Connection Type(s): ClusterLampholder

For use with 4″ round boxes

  • Cluster covers provide easy means for mounting lampholders and/or accessories
  • Rugged, seamless die-cast construction
  • Powder coated for maximum corrosion resistance
  • Includes installation hardware and gasket
  • 2 closure plugs included with 2 and 3 hole cluster covers
  • Available in bulk or custom shrink wrapped packaging
Color
Color Model Number
Bronze GC7052A1
Gray GC7052G1
Unpainted GC7052U1
White GC7052W1
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
65!
WARNING:
Risk of cancer and reproductive harm from exposure to Lead.
See www.P65Warnings.ca.gov
< Products

One-Gang Cover with One 1/2″ Hole

Material: Stamped Steel
Category: Weatherproof
Sub Category: Cover
Type(s): 1-Gang
Connection Type(s): ClusterLampholder

One hole cluster covers are used to provide a mounting location for a single lampholder to a one-gang weatherproof box.

  • With one 1/2″ threaded knockout
  • Includes gasket and hardware
Color
Color Model Number
Bronze GC1051A1
Black GC1051B1
Gray GC1051G1
White GC1051W1
ABC
4.612.850.57
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
65!
WARNING:
Risk of cancer and reproductive harm from exposure to Lead.
See www.P65Warnings.ca.gov
< Products

Rectangular Lamp Holder Cover

Material: Stamped Steel
Category: Weatherproof
Sub Category: Cover
Type(s): 1-Gang
Connection Type(s): ClusterLampholder

For use with rectangular boxes

  • Cluster covers provide easy means for mounting lampholders and/or accessories
  • Rugged, seamless die-cast construction
  • Powder coated for maximum corrosion resistance
  • Includes installation hardware and gasket
  • 2 closure plugs included with 2 and 3 hole cluster covers
  • Available in bulk or custom shrink wrapped packaging
Color
Color Model Number
Bronze GC1052A1
Gray GC1052G1
White GC1052W1
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
65!
WARNING:
Risk of cancer and reproductive harm from exposure to Lead.
See www.P65Warnings.ca.gov
< Products

One-Gang Cover with Three 1/2″ Holes

Material: Stamped Steel
Category: Weatherproof
Sub Category: Cover
Type(s): 1-Gang
Connection Type(s): ClusterLampholder

Three hole cluster covers are used to provide a mounting location for up to three lampholders to a one-gang weatherproof box.

  • With three 1/2″ threaded knockouts
  • Includes gasket, hardware and closure plugs
Color
Color Model Number
Bronze GC1053A1
Black GC1053B1
Gray GC1053G1
White GC1053W1
ABC
4.612.851.02
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
65!
WARNING:
Risk of cancer and reproductive harm from exposure to Lead.
See www.P65Warnings.ca.gov
< Products

Round Lampholder Cover with Three 1/2″ Holes

Material: Non-Metallic
Category: Weatherproof
Sub Category: Cover
Type(s): Round
Connection Type(s): ClusterLampholder

Three hole cluster covers are used to provide a mounting location for up to three lampholders to a 4″ round weatherproof box.

  • With three 1/2″ threaded knockouts
  • Includes gasket, hardware and closure plugs
Color
Color Model Number Master Pack Quantity UPC
Gray 14390 15 031857143909
White 14390WH 15 031857643904
AB
4.51.17
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
NEMA: NEMA 3R
< Products

One-Gang Lampholder Cover with Three 1/2″ Holes

Material: Non-Metallic
Category: Weatherproof
Sub Category: Cover
Type(s): 1-Gang
Connection Type(s): ClusterLampholder

Three hole cluster covers are used to provide a mounting location for up to three lampholders to a one-gang weatherproof box.

  • With three 1/2″ threaded knockouts
  • Includes gasket, hardware and closure plugs
Color
Color Model Number Master Pack Quantity UPC
Gray 14375 15 031857143756
White 14375WH 15 031857643751
ABC
4.773.011.22
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
NEMA: NEMA 3R
< Products

Round Cover with One 1/2″ Hole

Material: Metal Die-Cast
Category: Weatherproof
Sub Category: Cover
Type(s): Round
Connection Type(s): ClusterLampholder

One hole cluster covers are used to provide a mounting location for a single lampholder to a 4″ round weatherproof box.

  • With one 1/2″ threaded knockout
  • Includes gasket and hardware
Color
Color Model Number Master Pack Quantity UPC
Bronze 14381BR 10 031857343811
Gray 14381 20 031857143817
White 14381WH 10 031857643812
AB
4.130.57
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
NEMA: NEMA 3R
65!
WARNING:
Risk of cancer and reproductive harm from exposure to Lead.
See www.P65Warnings.ca.gov
< Products

Round Cover with Three 1/2″ Holes

Material: Metal Die-Cast
Category: Weatherproof
Sub Category: Cover
Type(s): Round
Connection Type(s): ClusterLampholder

Three hole cluster covers are used to provide a mounting location for up to three lampholders to a 4″ round weatherproof box.

  • With three 1/2″ threaded knockouts
  • Includes gasket, hardware and closure plugs
Color
Color Model Number Master Pack Quantity UPC
Bronze 14383BR 12 031857343835
Gray 14383 15 031857143831
White 14383WH 12 031857643836
AB
4.131.04
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
NEMA: NEMA 3R
65!
WARNING:
Risk of cancer and reproductive harm from exposure to Lead.
See www.P65Warnings.ca.gov
< Products

One-Gang Cover with One 1/2″ Hole

Material: Metal Die-Cast
Category: Weatherproof
Sub Category: Cover
Type(s): 1-Gang
Connection Type(s): ClusterLampholder

One hole cluster covers are used to provide a mounting location for a single lampholder to a one-gang weatherproof box.

  • With one 1/2″ threaded knockout
  • Includes gasket and hardware
Color
Color Model Number Master Pack Quantity UPC
Bronze 14371BR 10 031857343712
Gray 14371 15 031857143718
White 14371WH 10 031857643713
ABC
4.612.850.57
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
NEMA: NEMA 3R
65!
WARNING:
Risk of cancer and reproductive harm from exposure to Lead.
See www.P65Warnings.ca.gov
< Products

One-Gang Cover with Three 1/2″ Holes

Material: Metal Die-Cast
Category: Weatherproof
Sub Category: Cover
Type(s): 1-Gang
Connection Type(s): ClusterLampholder

Three hole cluster covers are used to provide a mounting location for up to three lampholders to a one-gang weatherproof box.

  • With three 1/2″ threaded knockouts
  • Includes gasket, hardware and closure plugs
Color
Color Model Number Master Pack Quantity UPC
Bronze 14373BR 10 031857343736
Gray 14373 15 031857143732
White 14373WH 10 031857643737
ABC
4.612.851.02
cULus: E163827
Standards: UL 1598, CSA C22.2 No. 250.0-08
NEMA: NEMA 3R
65!
WARNING:
Risk of cancer and reproductive harm from exposure to Lead.
See www.P65Warnings.ca.gov