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

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Plant Locations

Learn more about our global manufacturing facilities.

Company News

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Contact Us

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


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Global Code of Conduct

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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.

Sigma Castings

Multiple Casting Options to Meet Your Needs

Sigma Castings has significant expertise across various forms of castings and across a wide array of metals, all supported by in-house tooling and special purpose machine design and manufacturing. Our global footprint of 13 locations can help develop custom solutions to fit your specific product needs.

Our Casting Processes

High Pressure Die Casting

Die casting is the process of injecting a molten metal alloy into a die to form a die cast part. Sigma Castings has state-of-the-art aluminum and zinc die-casting equipment that can produce complex value-added sub-assembled components.

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molten metal being poured into dies

Sand Casting

In the sand casting process, molten metal is poured into molds made of compressed or compacted sand. It is one of the most widely used casting methods and it is ideal for products with complex shapes and inner cavities.

Learn More

Investment Casting

Investment casting is an industrial process based on lost wax casting. Investment casting creates products with tight dimensional and geometric accuracy and is ideal for near-net-shaped products with complex shapes and high precision requirements.

Learn More

molten metal being poured into cast

Gravity Die Casting

In the gravity die casting process, metals with high melting temperature are poured into a preformed mold from above, filling the mold from the bottom up using gravitational force. It is ideal for products that require heat treating of the casting.

Learn More

metal objects on a steel plate with polishing liquid

Partner Services

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

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Rapid Prototyping

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Custom Tooling

Precision Machining

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Surface Finishing

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Special Purpose Machine Design & Development

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