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.

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

Threaded Nipple

Material: Galvanized Steel
Category: Fittings
Sub Category: Rigid
Type(s): Nipple
Connection Type(s): Threaded

Threaded nipples are used to extend a length of threaded Rigid conduit or IMC. May also be used to connect two steel outlet boxes or metal enclosures together.

Model Number
RN050/150
RN050/200
RN050/300
RN050/400
RN050/500
RN050/600
RN050/CL
RN075/150
RN075/200
RN075/300
RN075/400
RN075/500
RN075/600
RN075/CL
RN100/200
RN100/300
RN100/600
RN100/CL
RN125/200
RN125/300
RN125/600
RN125/CL
RN150/600
RN150/CL
RN200/1000
RN200/300
RN200/400
RN200/500
RN200/600
RN200/800
RN200/CL
RN250/400
RN300/400
AB
0.51.5
AB
0.52
AB
0.53
AB
0.54
AB
0.55
AB
0.56
AB
0.51.12
AB
0.751.5
AB
0.752
AB
0.753
AB
0.754
AB
0.755
AB
0.756
AB
0.751.37
AB
12
AB
13
AB
16
AB
11.5
AB
1.252
AB
1.253
AB
1.256
AB
1.251.63
AB
1.56
AB
1.51.75
AB
21
AB
23
AB
24
AB
25
AB
26
AB
28
AB
22
AB
2.54
AB
34
cULus: E468931

Standards: UL 6, CSA C22.2 No. 45.1-07
< Products

Offset Nipple

Material: Zinc Die-Cast
Category: Fittings
Sub Category: Rigid
Type(s): Nipple
Connection Type(s): Offset

Offset nipples are used to provide an offset connection between two outlet boxes or metal enclosures.

  • 3/4″ axis
Model Number
ON050
ON075
ON100
ON125
ON150
ON200
ON250
ON300
ABC
2.420.940.43
ABC
2.41.180.43
ABC
2.721.450.6
ABC
2.811.810.59
ABC
3.032.050.71
ABC
3.152.570.77
UL: E155411
CSA: LR57925

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

Conduit Nipple

Material: Malleable Iron
Category: Fittings
Sub Category: Rigid
Type(s): Nipple

Used with locknut to serve as a short raceway between enclosures

Model Number
MCN050
MCN075
MCN100
MCN125
MCN150
MCN200
MCN250
MCN300
MCN350
MCN400
MCN500
MCN600
UL: E155411
CSA: LR57925

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

Insulated Conduit Nipple

Material: Malleable Iron
Category: Fittings
Sub Category: Rigid
Type(s): Nipple
Feature(s): Insulated

Used with locknut to serve as a short raceway between enclosures

  • With 90° C rated insulated throat
Model Number
MCN050I
MCN075I
MCN100I
MCN125I
MCN150I
MCN200I
MCN250I
MCN300I
MCN350I
MCN400I
MCN500I
MCN600I
UL: E155411
CSA: LR57925

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

Insulated Conduit Nipple

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

Used with locknut to serve as a short raceway between enclosures

  • With 90° C rated insulated throat
Model Number
CN050I
CN075I
CN100I
CN125I
CN150I
CN200I
CN250I
CN300I
CN350I
CN400I
UL: E155411
CSA: LR57925

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

Conduit Nipple

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

Conduit nipples are used in conjunction with locknuts to provide a short raceway between two outlet boxes or metal enclosures.

Model Number
CN050
CN075
CN100
CN125
CN150
CN200
CN250
CN300
CN350
CN400
ABC
0.930.590.44
ABC
1.190.710.5
ABC
1.390.840.62
ABC
1.750.880.63
ABC
2.130.910.63
ABC
2.551.020.72
ABC
3.221.441.04
UL: E155411
CSA: LR57925

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

Threaded Nipple

Material: Zinc-Plated Steel
Category: Fittings
Sub Category: Rigid
Type(s): Nipple
Connection Type(s): Threaded

Threaded nipples are used to extend a length of threaded Rigid conduit or IMC. May also be used to connect two steel outlet boxes or metal enclosures together.

Model Number Retail Pack Master Pack Package Type
44360 2 10 Polybag
54251 1 25 Polybag
44370 2 8 Polybag
54254 1 25 Polybag
54256 1 25 Polybag
54257 1 25 Polybag
54258 1 25 Polybag
44361 2 8 Polybag
54261 1 25 Polybag
44371 2 5 Polybag
54264 1 25 Polybag
54266 1 15 Polybag
54267 1 15 Polybag
54268 1 25 Polybag
54270 1 10 Polybag
54272 1 25 Polybag
54274 1 10 Polybag
54280 1 10 Polybag
54281 1 25 Polybag
54284 1 10 Polybag
54364 1 6 Polybag
54290 1 10 Polybag
54365 1 4 Polybag
54300 1 10 Polybag
54304 1 6 Polybag
54306 1 5 Polybag
54366 1 5 Polybag
54309 1 2 Polybag
54355 1 2 Polybag
54316 1 4 Polybag
54326 1 2 Polybag
AB
0.51.12
AB
0.51.5
AB
0.52
AB
0.53
AB
0.54
AB
0.55
AB
0.56
AB
0.751.37
AB
0.751.5
AB
0.752
AB
0.753
AB
0.754
AB
0.755
AB
0.756
AB
11.5
AB
12
AB
13
AB
1.251.63
AB
1.252
AB
1.253
AB
1.256
AB
1.51.75
AB
1.56
AB
22
AB
23
AB
24
AB
26
AB
28
AB
210
AB
2.54
AB
34
cULus: E468931

Standards: UL 6, CSA C22.2 No. 45.1-07
< Products

Offset Nipple

Material: Zinc Die-Cast
Category: Fittings
Sub Category: Rigid
Type(s): Nipple
Connection Type(s): Offset

Offset nipples are used to provide an offset connection between two outlet boxes or metal enclosures.

  • 3/4″ axis
Model Number Retail Pack Master Pack Package Type
49020 1 20 Polybag
49021 1 10 Polybag
02-51522 1 10 Boxed - Individual UPC
51522M 1 10 Boxed - Individual UPC
02-51523 1 10 Boxed - Individual UPC
51523M 1 5 Boxed - Individual UPC
02-51524 1 5 Boxed - Individual UPC
51524M 1 5 Boxed - Individual UPC
02-51525 1 5 Boxed - Individual UPC
51525M 1 2 Boxed - Individual UPC
ABC
2.420.940.43
ABC
2.41.180.43
ABC
2.721.450.6
ABC
2.811.810.59
ABC
3.032.050.71
ABC
3.152.570.77
UL: E155411
CSA: LR57925

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

Conduit Nipple

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

Conduit nipples are used in conjunction with locknuts to provide a short raceway between two outlet boxes or metal enclosures.

Model Number Retail Pack Master Pack Package Type
49202 1 25 Polybag
49203 1 10 Polybag
49204 1 25 Polybag
49205 1 12 Polybag
49206 1 10 Polybag
49209 1 10 Polybag
02-57208 1 2 Boxed - Individual UPC
ABC
0.930.590.44
ABC
1.190.710.5
ABC
1.390.840.62
ABC
1.750.880.63
ABC
2.130.910.63
ABC
2.551.020.72
ABC
3.221.441.04
UL: E155411
CSA: LR57925

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