Electrical

An extensive range of robust fittings and weatherproof products.

Automotive

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

Power Transmission & Distribution

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

Aerospace

Complex sensor housings & fracture-critical products.

Appliances

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.

Lighting

Custom housings to fully assembled commercial & industrial light fixtures.

Marine

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.

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

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

Resources

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.

< Products

Service Entrance Heads – Threaded Type

Material: Aluminum Die-Cast
Category: Fittings
Sub Category: NMSE
Type(s): Service Entrance Head
Connection Type(s): Threaded

Threaded type head used with rigid conduit and IMC for pulling service drop conductors

  • Assembled with electrical grade insulator with multiple holes
  • UL listed and CSA certified for wet location use
  • Die-cast from high strength, corrosion and weather resistant aluminum alloy
Model Number
TH050
TH075
TH100
TH125
TH150
TH200
TH250
TH300
TH300L
TH350
TH400
TH500
TH600
UL,: E121487,
CSA,: LR57925,

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

Service Entrance Heads – Set Screw Type

Material: Aluminum Die-Cast
Category: Fittings
Sub Category: NMSE
Type(s): Service Entrance Head
Connection Type(s): Set Screw

Set screw type head used with rigid and IMC for pulling service drop conductors

  • Assembled with electrical grade insulator with multiple holes
  • UL listed and CSA certified for wet location use
  • Die-cast from high strength, corrosion and weather resistant aluminum alloy
Model Number
SS050
SS075
SS100
SS125
SS150
SS200
SS250
SS300
SS300L
SS350
SS400
UL: E121487
CSA: LR57925

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

Oval Service Entrance Head

Material: Aluminum Die-Cast
Category: Fittings
Sub Category: NMSE
Type(s): Service Entrance Head
Connection Type(s): Oval Type

Die-cast oval service entrance caps are used as a connecting point in an overhead service entrance for Oval SE cable.

  • Removable cap
  • Two piece phenolic insulator
  • Listed for use in dry locations
Model Number
SCEH1
SCEH2
ABC
2.922.453.22
ABC
4.483.41.97
UL: E155410
CSA: LR57925

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

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

< Products

Service Entrance Heads – Mast Type

Material: Aluminum Die-Cast
Category: Fittings
Sub Category: NMSE
Type(s): Service Entrance Head
Connection Type(s): Mast Type

Service entrance caps are used as a connecting point in an overhead service entrance and can be mounted on threaded or unthreaded Rigid or IMC conduit.

  • Slip fit
  • Phenolic insulator with multiple holes
  • Listed for use in wet locations
Model Number
MT1
MT3
MT2
MT4
ABC
2.663.723.14
ABC
3.124.574.2
UL: E121487
CSA: LR57925

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

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

< Products

Clamp-On Service Entrance Head

Material: Aluminum Die-Cast
Category: Fittings
Sub Category: NMSE
Type(s): Service Entrance Head
Connection Type(s): Clamp-On

Service entrance heads are used as a connecting point in an overhead service entrance and can be mounted on threaded or unthreaded Rigid, IMC or EMT conduit.

  • Clamp-on type
  • Phenolic insulator with multiple holes
  • Listed for use in wet locations
Model Number
CO050
CO075
CO100
CO125
CO150
CO200
CO250
CO300
ABC
2.252.221.93
ABC
2.482.512.2
ABC
2.752.852.55
ABC
3.122.92.98
ABC
3.753.683.18
ABC
4.345.284.61
ABC
5.5910.596.14
ABC
6.3810.716.14
UL: E121487
CSA: LR57925

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

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

< Products

Service Entrance Heads – Clamp-on Type

Material: Aluminum Die-Cast
Category: Fittings
Sub Category: NMSE
Type(s): Service Entrance Head
Connection Type(s): Clamp-On

Clamp-on type head used with rigid conduit, IMC or EMT for pulling service drop conductors

  • Assembled with electrical grade insulator with multiple holes
  • UL listed and CSA certified for wet location use
  • Die-cast from high strength, corrosion and weather resistant aluminum alloy
Model Number
CO300L
CO350
CO400
UL: E121487
CSA: LR57925

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

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

< Products

Oval Service Entrance Head

Material: Aluminum Die-Cast
Category: Fittings
Sub Category: NMSE
Type(s): Service Entrance Head
Connection Type(s): Oval Type

Die-cast oval service entrance caps are used as a connecting point in an overhead service entrance for Oval SE cable.

  • Removable cap
  • Two piece phenolic insulator
  • Listed for use in dry locations
Model Number Retail Pack Master Pack Package Type
02-51200 1 5 Boxed - Individual UPC
02-51235 1 5 Boxed - Individual UPC
ABC
2.922.453.22
ABC
4.483.41.97
UL: E155410
CSA: LR57925

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

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

< Products

Service Entrance Heads – Mast Type

Material: Aluminum Die-Cast
Category: Fittings
Sub Category: NMSE
Type(s): Service Entrance Head
Connection Type(s): Mast Type

Service entrance caps are used as a connecting point in an overhead service entrance and can be mounted on threaded or unthreaded Rigid or IMC conduit.

  • Slip fit
  • Phenolic insulator with multiple holes
  • Listed for use in wet locations
Model Number Retail Pack Master Pack Package Type
02-51456 1 4 Boxed - Individual UPC
02-51458 1 2 Boxed - Individual UPC
ABC
2.663.723.14
ABC
3.124.574.2
UL: E121487
CSA: LR57925

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

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

< Products

Clamp-On Service Entrance Head

Material: Aluminum Die-Cast
Category: Fittings
Sub Category: NMSE
Type(s): Service Entrance Head
Connection Type(s): Clamp-On

Service entrance heads are used as a connecting point in an overhead service entrance and can be mounted on threaded or unthreaded Rigid, IMC or EMT conduit.

  • Clamp-on type
  • Phenolic insulator with multiple holes
  • Listed for use in wet locations
Model Number Retail Pack Master Pack Package Type
02-51251 1 10 Boxed - Individual UPC
02-51252 1 10 Boxed - Individual UPC
02-51253 1 5 Boxed - Individual UPC
02-51254 1 2 Boxed - Individual UPC
02-51255 1 2 Boxed - Individual UPC
02-51256 1 3 Boxed - Individual UPC
02-51257 1 2 Boxed - Individual UPC
02-51258 1 1 Boxed - Individual UPC
ABC
2.252.221.93
ABC
2.482.512.2
ABC
2.752.852.55
ABC
3.122.92.98
ABC
3.753.683.18
ABC
4.345.284.61
ABC
5.5910.596.14
ABC
6.3810.716.14
UL: E121487
CSA: LR57925

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

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