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

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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

Conduit Locknut

Material: Steel
Category: Fittings
Sub Category: Rigid
Type(s): Locknut

Conduit locknuts are used for securing Rigid conduit, IMC and other threaded connectors to a steel outlet box or metal enclosure.

Model Number
SLN037
SLN050
SLN075
SLN100
SLN125
SLN150
SLN200
SLN250
SLN300
SLN400
ABC
1.120.091
ABC
1.390.11.25
ABC
1.70.131.56
ABC
2.040.131.91
ABC
2.360.132.16
ABC
2.870.132.68
ABC
3.520.163.25
ABC
4.130.163.95
< Products

Zinc Die-Cast Locknuts

Material: Zinc Die-Cast
Category: Fittings
Sub Category: Rigid
Type(s): Locknut

Used for securing rigid IMC conduits and other threaded connectors to outlet boxes or enclosures

  • Designed with highly effective cast threads
  • Serrations provided on both sides for improved grip
Model Number
LNC050
LNC075
LNC100
LNC125
LNC150
LNC200
LNC250
LNC300
LNC350
LNC400
UL: E155411
CSA: LR57925

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

Conduit Locknut

Material: Zinc-Plated Steel
Category: Fittings
Sub Category: Rigid
Type(s): Locknut

Conduit locknuts are used for securing Rigid conduit, IMC and other threaded connectors to a steel outlet box or metal enclosure.

Model Number Retail Pack Master Pack Package Type
49101 2 100 Polybag
47101 3 50 Polybag
45101 20 20 Polybag
55101 100 10 Bulk - No individual UPC
48102 2 50 Polybag
49102 2 100 Polybag
45102 20 20 Polybag
55102 100 10 Bulk - No individual UPC
47103 1 50 Polybag
49103 2 50 Polybag
55103 100 10 Bulk - No individual UPC
49104 1 50 Polybag
47104 2 18 Polybag
49105 1 25 Polybag
47105 2 15 Polybag
49106 1 25 Polybag
47106 2 25 Polybag
49107 1 10 Polybag
49108 1 10 Polybag
ABC
1.120.091
ABC
1.390.11.25
ABC
1.70.131.56
ABC
2.040.131.91
ABC
2.360.132.16
ABC
2.870.132.68
ABC
3.520.163.25
ABC
4.130.163.95