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NSI Industries 257-SRT - Connector, compression, steel, size 3"
NSI Industries

257-SRT

UPC: 781747202574


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Overview

NSI Industries 257-SRT is a UL486A-listed steel compression connector engineered for splicing flexible and extra-flexible copper cables in demanding industrial environments. This 3" size connector features flared openings at both ends to simplify cable insertion, reducing installation time and effort. A positive center stop prevents over-insertion, ensuring consistent, reliable connections. Tin-plated for superior corrosion resistance, the 257-SRT supports copper cables only with a 90°C temperature rating and 600V maximum voltage. Ideal for locomotive, welding, and mining cables, this connector delivers durable performance in damp or wet locations. Listed for use in UL-listed applications, the 257-SRT is a trusted solution for heavy-duty electrical splicing where performance and longevity matter.
  • UL486A and cULus Listed (155027) for compliance and reliability
  • 3" size for flexible and extra-flexible copper cables (locomotive, welding, mining)
  • Flared openings for easy cable insertion and positive center stop to prevent over-insertion
  • Tin-plated steel construction for corrosion resistance in damp or wet environments
  • 90°C temperature rating and 600V maximum voltage for industrial applications

Specifications

Application
Used to join EMT to box or enclosure. Concrete/Raintight
Color
Orange
Connection Type
Compression
Connector Type
Compression
Finish
Zinc Electroplated
Insulation
False
Ip Rating
IP66/IP67
Material
Steel
Material Quality
Steel
Size
3 IN
Special Features
Connectors assembled with knockout gasket, no separate pieces to buy and stock
Standard
cULus
Trade Size
3 in.
Type
Connector
Package Weight (Imperial)
2.131 L
Package Weight (Metric)
0.967 kg
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Frequently Asked Questions

Is the 257-SRT connector raintight?

Yes, the connector is designed to be raintight.

What is the purpose of the 257-SRT connector?

It is used to join EMT to a box or enclosure.

What is the trade size of the 257-SRT connector?

The trade size of the connector is 3 inches.

What is the trade size of the 257-SRT connector?

The trade size of the connector is 3 inches.

What is the purpose of the 257-SRT connector?

It is used to join EMT to a box or enclosure.

Is the 257-SRT connector raintight?

Yes, the connector is designed to be raintight.

What material is the 257-SRT connector made of?

The 257-SRT connector is made of steel.

What are the dimensions of the 257-SRT connector?

The dimensions are A: 2-13/16 inches, B: 3-3/4 inches, C: 4-3/8 inches.

How many connectors are in a standard package?

A standard package contains 10 connectors.

What are the dimensions of the 257-SRT connector?

The dimensions are A: 2-13/16 inches, B: 3-3/4 inches, C: 4-3/8 inches.

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