An extensive range of robust fittings and weatherproof products.


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

Power Transmission & Distribution

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


Complex sensor housings & fracture-critical products.


Robust castings and assemblies for everyday appliances.

Commercial Hardware

Finished components for commercial & residential hardware applications.

Electronics & Telecom

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

Fluid Power

Durable, precision products for high-pressure applications.

Food & Beverage

Handles, leveling pins, flow valves & button housings.


Custom housings to fully assembled commercial & industrial light fixtures.


Durable corrosion-resistant engineered castings and subassemblies.

Medical & Dental

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

Oil & Gas

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

Power Tools

Durable yet lightweight custom metal housings.


Innovative precision metal stamped parts.

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

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

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

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

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

Precision Metal Stamping

More than 80 presses convert metal sheets into custom parts

Ideal for parts for electronic connectors and microprocessor chips

Swiss Screw Machining

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

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

Partner Services

Rapid Prototypes, Heat Treating, Automated Assembly

Company History

Learn more about our company milestones.

Plant Locations

Learn more about our global manufacturing facilities.

Company News

See our company announcements and press releases.

Contact Us

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


Download catalogs and key product guides.

Global Code of Conduct

Download our Code of Conduct and report violations.

Innovation at Sigma

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

Engineered Solutions

Sigma offers solutions for complex product characteristics and technical requirements.

Global Supply Chain Management

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

Partner Services

Sigma is a vertically integrated single-source solution provider.

Electrical Market Solutions

Supporting the Electrical Market

Sigma is the #1 supplier of fittings and weatherproof products to the OEM and retail market.

Sigma Engineered Solutions is a trusted manufacturer of products that help bring electricity to consumers. Our extensive range of robust fittings and weatherproof products are designed to withstand the elements and certified to meet or exceed applicable UL and CSA standards. Our products have been successfully deployed in commercial, industrial, and residential construction for more than 40 years.

Sigma Castings produces and supplies more than 15,000 SKU’s to our OEM and retail customers. Our robust supply chain capabilities allow us to ship these products to customers either on a direct ship basis or through our N.C. warehouse. We are vertically integrated and manufacture all products in-house. With our state-of-the-art tool room and Special Purpose Machine (SPM) building capability, we ensure the superior response and reliability our customers demand. We also perform all downstream operations like plating, painting, and machining in-house, allowing us to provide our customers with consistent quality products at industry-leading fill rates.

Our in-house UL-approved lab can shorten overall development time. Sigma offers late-point customized packaging, and our U.S.-based warehousing shortens lead times to further enhance our best-in-class fill rates.

electrical conduits going from floor to ceiling
Weatherproof Products
Conduit Fittings
Strain Relief

Weatherproof Products

Sigma is the industry leader in outdoor weatherproof products, including a range of die cast metal weatherproof boxes, covers, and lampholders.

LED Floodlights
LED Spikelights
Weatherproof Covers

Conduit Fittings

Conduit Body
Conduit Coupling
Conduit Strap

Strain Relief

Box Connector
Non-metallic Connector
90º Angular

Additional Product Examples

Weatherproof Box
Weatherproof Boxes
Romex Connector
Romex Clamp Type Connectors
Grounding Clamp
Grounding Clamps
Duplex Cover
Weatherproof Duplex Covers
Double Snap Lock® AC/MC Connectors
electrician working in framed house with dramatic lighting

Our Services

Sigma offers a number of services that can help with your Electrical product needs.

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Rapid Prototyping

Product Testing

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Custom Tooling

Precision Machining

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Surface Finishing

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Special Purpose Machine Design & Development

See All Services