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.

Solar
Solar

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
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

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.

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

< Products

Combination Ground Clamps for Bare Wire

Material: Copper Alloy
Category: Fittings
Sub Category: Grounding
Type(s): Clamp
Connection Type(s): Bare WireLay-In-Lug

Used to connect bare copper wire to water pipe or rebar

  • Available with lay-in style lug for fast and easy installation of ground wires
  • Cast from high strength, highly conductive copper alloy
  • All models approved for Direct Burial in earth and concrete
  • Stainless steel hardware
  • Perpendicular lug style
Model Number
RBC3SS
cULus: E88878

Standards: UL 467, CSA C22.2 No. 41
Other: NEC Article 250
< Products

Combination Ground Clamps for Bare Wire

Material: Copper Alloy
Category: Fittings
Sub Category: Grounding
Type(s): Clamp
Connection Type(s): Bare WireFeed-thru

Used to connect bare copper wire to water pipe or rebar

  • Available with feed-through style lug for fast and easy installation of ground wires
  • Cast from high strength, highly conductive copper alloy
  • All models approved for Direct Burial in earth and concrete
  • Features super-compact design ideal for rebar grids, pools and spas
  • Stainless steel hardware
  • In-line lug style
Model Number
RBC1SS
cULus: E88878

Standards: UL 467, CSA C22.2 No. 41
Other: NEC Article 250
< Products

Combination Ground Clamps for Bare Wire

Material: Copper Alloy
Category: Fittings
Sub Category: Grounding
Type(s): Clamp
Connection Type(s): Bare WireLay-In-Lug

Used to connect bare copper wire to water pipe or rebar

  • Available with lay-in style lug for fast and easy installation of ground wires
  • Cast from high strength, highly conductive copper alloy
  • All models approved for Direct Burial in earth and concrete
  • Bronze hardware
  • Perpendicular lug style
Model Number
RBC3D
cULus: E88878

Standards: UL 467, CSA C22.2 No. 41
Other: NEC Article 250
< Products

Ground Clamp with Lay-In Lug

Material: Copper Alloy
Category: Fittings
Sub Category: Grounding
Type(s): Clamp
Connection Type(s): Bare WireLay-In-Lug

Ground clamps with lay-in lug are used to connect a ground wire in Rigid conduit or Rebar to copper or galvanized steel water pipe.

  • Suitable for direct burial in ground and concrete
Model Number
RBC4D
ABC
2.281.50.95
cULus: E88878

Standards: UL 467, CSA C22.2 No. 41
Other: NEC Article 250
65!

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.

< Products

Combination Ground Clamps for Bare Wire

Material: Copper Alloy
Category: Fittings
Sub Category: Grounding
Type(s): Clamp
Connection Type(s): Bare WireFeed-thru

Used to connect bare copper wire to water pipe or rebar

  • Available with feed-through style lug for fast and easy installation of ground wires
  • Cast from high strength, highly conductive copper alloy
  • All models approved for Direct Burial in earth and concrete
  • Features super-compact design ideal for rebar grids, pools and spas
  • Bronze hardware
  • In-line lug style
Model Number
RBC1D
cULus: E88878

Standards: UL 467, CSA C22.2 No. 41
Other: NEC Article 250
< Products

Combination Ground Clamps for Bare Wire

Material: Copper Alloy
Category: Fittings
Sub Category: Grounding
Type(s): Clamp
Connection Type(s): Bare WireLay-In-Lug

Used to connect bare copper wire to water pipe or rebar

  • Available with lay-in style lug for fast and easy installation of ground wires
  • Cast from high strength, highly conductive copper alloy
  • All models approved for Direct Burial in earth and concrete
  • Bronze hardware or Stainless steel hardware available
  • In-line lug style
Model Number
RBC2D
RBC2SS
cULus: E88878

Standards: UL 467, CSA C22.2 No. 41
Other: NEC Article 250
< Products

Ground Clamp

Material: Zinc Die-Cast
Category: Fittings
Sub Category: Grounding
Type(s): Clamp
Connection Type(s): Bare Wire

Ground clamps are used to connect bare or insulated copper wire to copper or galvanized steel water pipe.

Model Number
CZ11
ABC
2.241.340.63
UL: E88878
CSA: LR57925

Standards: UL 467, UL 486A-486B, CSA C22.2 No. 41-13, CSA C22.2 No. 65-13
< Products

Ground Clamp for Bare Wire

Material: Zinc Die-Cast
Category: Fittings
Sub Category: Grounding
Type(s): Clamp
Connection Type(s): Bare Wire

Used to connect copper or aluminum ground conductor to galvanized water pipe, copper water tubing, or ground rod

  • Cast from high strength zinc alloy
  • Zinc plated
Model Number
CZ11P
CSA: LR57925

Standards: UL 467, UL 486A-486B, CSA C22.2 No. 41-13, CSA C22.2 No. 65-13
< Products

Standard Bronze Ground Clamp for Bare Wire

Material: Copper Alloy
Category: Fittings
Sub Category: Grounding
Type(s): Clamp
Connection Type(s): Bare Wire

Used to connect bare copper wire to galvanized steel water pipe or copper tubing

  • Cast from high strength, highly conductive copper alloy
  • Approved for use with rebar and copper ground rod
  • Brass hardware
Model Number
C11B
UL: E88878
CSA: LR57925

Standards: UL 467, CSA C22.2 No. 41
Other: NEC Article 250
65!

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.

< Products

Ground Clamp,Standard Bronze Ground Clamp for Bare Wire

Material: Copper Alloy
Category: Fittings
Sub Category: Grounding
Type(s): Clamp
Connection Type(s): Bare Wire

Ground clamps are used to connect bare or insulated copper wire to copper or galvanized steel water pipe.,Used to connect bare copper wire to galvanized steel water pipe or copper tubing

  • Assembled with die-cast locknut and zinc plated steel screws
  • ,Zinc plated steel hardware
  • Light duty construction
Model Number
C11
C22
C4
C5
C8
ABC
2.251.380.63
ABC
3.562.130.72
ABC
6.343.650.97
UL: E88878
CSA: LR57925

Standards: UL 467, CSA C22.2 No. 41
Other: NEC Article 250
65!

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.

< Products

Ground Clamp

Material: Zinc Die-Cast
Category: Fittings
Sub Category: Grounding
Type(s): Clamp
Connection Type(s): Bare Wire

Ground clamps are used to connect bare or insulated copper wire to copper or galvanized steel water pipe.

Model Number Retail Pack Master Pack Package Type
18160 1 10 Polybag
49160 1 25 Polybag
ABC
2.241.340.63
UL: E88878
CSA: LR57925

Standards: UL 467, UL 486A-486B, CSA C22.2 No. 41-13, CSA C22.2 No. 65-13
< Products

Ground Clamp

Material: Copper Alloy
Category: Fittings
Sub Category: Grounding
Type(s): Clamp
Connection Type(s): Bare Wire

Ground clamps are used to connect bare or insulated copper wire to copper or galvanized steel water pipe.

Model Number Retail Pack Master Pack Package Type
41309 1 20 Polybag
41311 1 6 Polybag
51313 1 4 Boxed - Individual UPC
ABC
2.251.380.63
ABC
3.562.130.72
ABC
6.343.650.97
UL: E88878
CSA: LR57925

Standards: UL 467, CSA C22.2 No. 41
Other: NEC Article 250
65!

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.