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

Plastic Insulating Bushing

Material: Non-Metallic
Category: Fittings
Sub Category: Rigid
Type(s): Bushing
Connection Type(s): Insulating

Plastic insulating bushings are used on the end of Rigid conduit, IMC and other threaded connectors to provide a smooth, well-rounded bearing surface to protect wires or cables.

  • Rated 105°C
  • Flame retardant
Model Number
PB050
PB075
PB100
PB125
PB150
PB200
PB250
PB300
PB350
PB400
ABC
1.050.360.6
ABC
1.290.40.78
ABC
1.630.491
ABC
1.930.481.3
ABC
2.180.481.52
ABC
2.640.541.95
ABC
3.250.632.33
ABC
3.90.682.9
cULus: E121487

Standards: UL 514B, CSA C22.2 No. 18.3-12
65!

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

< Products

Insulated Set Screw Conduit Bushing

Material: Malleable Iron
Category: Fittings
Sub Category: Rigid
Type(s): Bushing
Connection Type(s): InsulatingSet Screw
Feature(s): Insulated

Used to terminate rigid conduit or IMC to an enclosure

  • Bushing throat provides a smooth surface to prevent damage to wire during pulling
  • With 150°C rated insulator
Model Number
MGBI050SS
MGBI075SS
MGBI100SS
MGBI125SS
MGBI150SS
MGBI200SS
MGBI250SS
MGBI300SS
MGBI350SS
MGBI400SS
MGBI500SS
MGBI600SS
UL: E155411
CSA: LR57925

Standards: UL 514B, CSA 22.2 No. 18
< Products

Insulated Set Screw Conduit Bushing

Material: Malleable Iron
Category: Fittings
Sub Category: Rigid
Type(s): Bushing
Connection Type(s): InsulatingSet Screw
Feature(s): Insulated

Used to terminate rigid conduit or IMC to an enclosure

  • Bushing throat provides a smooth surface to prevent damage to wire during pulling
  • With 105°C rated insulator
Model Number
MGBG050SS
MGBG075SS
MGBG100SS
MGBG125SS
MGBG150SS
MGBG200SS
MGBG250SS
MGBG300SS
MGBG350SS
MGBG400SS
MGBG500SS
MGBG600SS
UL: E155411
CSA: LR57925

Standards: UL 514B, CSA 22.2 No. 18
< Products

Insulated Conduit Bushing

Material: Malleable Iron
Category: Fittings
Sub Category: Rigid
Type(s): Bushing
Connection Type(s): Insulating
Feature(s): Insulated

Used to terminate rigid conduit or IMC to an enclosure

  • Bushing throat provides a smooth surface to prevent damage to wire during pulling
  • With 150°C rated insulator
Model Number
MGBI050
MGBI075
MGBI100
MGBI125
MGBI150
MGBI200
MGBI250
MGBI300
MGBI350
MGBI400
MGBI500
MGBI600
UL: E155411
CSA: LR57925

Standards: UL 514B, CSA 22.2 No. 18
< Products

Insulated Conduit Bushing

Material: Malleable Iron
Category: Fittings
Sub Category: Rigid
Type(s): Bushing
Connection Type(s): Insulating
Feature(s): Insulated

Used to terminate rigid conduit or IMC to an enclosure

  • Bushing throat provides a smooth surface to prevent damage to wire during pulling
  • With 105°C rated insulator
Model Number
MGBG050
MGBG075
MGBG100
MGBG125
MGBG150
MGBG200
MGBG250
MGBG300
MGBG350
MGBG400
MGBG500
MGBG600
UL: E155411
CSA: LR57925

Standards: UL 514B, CSA 22.2 No. 18
< Products

Insulated Conduit Bushing without Lug

Material: Zinc Die-Cast
Category: Fittings
Sub Category: Rigid
Type(s): Bushing
Connection Type(s): Insulating
Feature(s): Insulated

Used to terminate threaded rigid conduit or IMC to an enclosure

  • Bushing throat provides a smooth surface to prevent damage to wire during pulling
  • With 150°C rated insulator
Model Number
GBI050T
GBI075T
GBI100T
GBI125T
GBI150T
GBI200T
GBI250T
GBI300T
GBI350T
GBI400T
cULus: E155411

Standards: UL 514B, CSA C22.2 No. 18.3-12
< Products

Insulated Conduit Bushing

Material: Zinc Die-Cast
Category: Fittings
Sub Category: Rigid
Type(s): Bushing
Connection Type(s): Insulating
Feature(s): Insulated

Used to terminate rigid conduit or IMC to an enclosure

  • Bushing throat provides a smooth surface to prevent damage to wire during pulling
  • With 150°C rated insulator
Model Number
GBI050
GBI075
GBI100
GBI125
GBI150
GBI200
GBI250
GBI300
GBI350
GBI400
UL: E155411
CSA: LR57925

Standards: UL 514B, CSA 22.2 No. 18
< Products

Plastic Insulating Bushing

Material: Non-Metallic
Category: Fittings
Sub Category: Rigid
Type(s): Bushing
Connection Type(s): Insulating

Plastic insulating bushings are used on the end of Rigid conduit, IMC and other threaded connectors to provide a smooth, well-rounded bearing surface to protect wires or cables.

  • Rated 105°C
  • Flame retardant
Model Number Retail Pack Master Pack Package Type
49321 2 100 Polybag
47321 1 50 Polybag
55321 100 10 Bulk - No individual UPC
47322 1 50 Polybag
49322 2 50 Polybag
55322 100 10 Bulk - No individual UPC
49323 1 25 Polybag
55323 50 10 Bulk - No individual UPC
49324 1 25 Polybag
49325 1 25 Polybag
49326 1 25 Polybag
55326 50 1 Bulk - No individual UPC
49327 1 10 Polybag
49328 1 10 Polybag
ABC
1.050.360.6
ABC
1.290.40.78
ABC
1.630.491
ABC
1.930.481.3
ABC
2.180.481.52
ABC
2.640.541.95
ABC
3.250.632.33
ABC
3.90.682.9
cULus: E121487

Standards: UL 514B, CSA C22.2 No. 18
NEMA: NEMA FB-1
65!

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

< Products

Insulating Bushing

Material: Non-Metallic
Category: Fittings
Sub Category: EMT
Type(s): Bushing
Connection Type(s): Insulating

Insulating bushings are used on the end of EMT conduit to provide a smooth, well-rounded bearing surface to protect wires or cables as required by the National Electric Code (NEC).

Model Number Retail Pack Master Pack Package Type
48200 4 10 Polybag
48202 4 10 Polybag
AB
0.520.57
AB
0.540.76
65!

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