NSi Industries 251-MSRT - Bridgeport Fittings Mighty-Seal« 3/4 inch EMT Connectors are used to connect a 3/4 inch EMT raceway to a box, device or enclosure.  The 251MSRT 3/4 inch Mighty-Seal connector is UL listed for use in wet locations. Raintight. Patented
NSI Industries

251-MSRT

UPC: 781747172518


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Overview

NSI Industries Bridgeport Fittings Mighty-Seal™ 251-MSRT 3/4 inch EMT Connectors provide a fast, tool-free solution for connecting 3/4 inch EMT raceways to boxes, devices, or enclosures. Designed for wet locations, these connectors are UL listed and raintight, ensuring reliable performance in challenging environments. Installation takes just seconds—no tools required—reducing labor time by up to 75% compared to traditional threaded connectors. The patented Mighty-Seal design creates a secure, vibration-resistant connection that maintains integrity even under heavy use. Ideal for commercial, industrial, and outdoor electrical installations, these connectors simplify conduit termination while meeting NEC and UL requirements for wet locations. Compatible with standard 3/4 inch EMT, the 251-MSRT features a removable design for easy reconfiguration or maintenance. Trust NSI Industries’ proven reliability for your next EMT connection project.
  • UL listed for wet locations (raintight)
  • Tool-free push-on installation (75% faster than threaded)
  • No tools required for quick, secure connections
  • Patented Mighty-Seal design for vibration resistance
  • Removable for easy reconfiguration or maintenance

Specifications

Application
Bridgeport Fittings Mighty-Seal® 3/4 inch EMT Connectors are used to connect a 3/4 inch EMT raceway to a box, device, or enclosure. The 251-MSRT 3/4 inch Mighty-Seal® connector is UL listed for use in wet locations.
Connection Type
Push-on
Connector Type
PUSH-EMT®
Finish
Ball burnish
Insulation
False
Ip Rating
IP66/IP67
Material
Steel
Material Quality
Zinc Die Cast
Series
Mighty-Seal
Size
3/4 IN
Size
3/4"
Special Features
Connectors assembled with knockout gasket, no separate pieces to buy and stock
Standard
cULus
Trade Size
3/4 in.
Type
Connector
Package Weight (Imperial)
0.168 L
Package Weight (Metric)
0.076 kg

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Frequently Asked Questions

What is the trade size of the 251-MSRT connector?

The trade size of the 251-MSRT connector is 3/4 inch.

Is the 251-MSRT connector suitable for wet locations?

Yes, the 251-MSRT connector is UL listed for use in wet locations.

What material is the 251-MSRT connector made from?

The 251-MSRT connector is made from zinc die cast.

What certifications does the 251-MSRT connector have?

The connector has certifications including UL514B and CSA 22.2.

What is the installation process for the 251-MSRT?

Installation involves inserting a properly deburred end of EMT into the Mighty-Seal® and rotating until it reaches the end stop.

How do you remove the 251-MSRT connector?

Removal is done by loosening the nut and taking out the component parts from the conduit.

What is the finish of the 251-MSRT connector?

The finish of the 251-MSRT connector is ball burnished.

Frequently Asked Questions about NSi Industries

What technical support does NSi Industries offer?

NSi Industries offers dedicated technical support through their toll-free technical support line at 888.500.4598. They are committed to customer satisfaction and promise to make every reasonable effort to remedy any product or service issues. Additionally, customers can contact their customer service team at 800.321.5847 or email [email protected] for further technical assistance.

What are the key features of NSi Industries products?

NSi Industries products feature exceptional versatility, reliability, and safety across multiple industrial automation categories. Key features include insulation piercing connectors with no wire stripping required, watertight and corrosion-free designs, wide wire range compatibility (from #14 AWG to 750 MCM), and the ability to install on energized conductors. Their product lines like Easy-Tap™ Connectors and TORK® Digital Timers demonstrate advanced capabilities such as turbo spacers, double shear-head bolts, astronomic scheduling, and enhanced switching technologies.

What environmental ratings do NSi Industries products have?

NSi Industries enclosures feature robust environmental ratings, including IEC 60529 IP66 certification, NEMA Type 1, 2, 3, 4, 4X, 12, and 13 ratings, and UL/CSA standards. Their products are designed for both indoor and outdoor applications, with protection against dust, water, corrosion, and extreme temperatures ranging from -40°F to 266°F.

How are NSi Industries products typically installed?

NSi Industries products are typically installed using detailed mechanical and digital wiring diagrams that specify precise connection methods for various voltage configurations (120V, 208V, 240V, 277V, 480V). Installation involves carefully following product-specific wiring schematics, which include clear terminal block connections, ground wire specifications, and phase alignment requirements. Professional electricians and technicians should reference the specific product's wiring diagram to ensure correct installation and electrical compliance.

What industries and applications are NSi Industries products used for?

NSi Industries provides electrical and automation products for diverse industrial applications, including lighting control, electrical enclosures, wire management, connectors, and sensor technologies. Their product lines serve commercial, industrial, and infrastructure markets with solutions for electrical infrastructure, control systems, and safety-critical environments.

What are the main product lines offered by NSi Industries?

NSi Industries offers a comprehensive range of industrial products including TORK® Photocontrols, Polaris™ Lighting Controls, Easy-Twist™ Grounding Solutions, Miniterms, Cable Ties, Connectors, Enclosures, Occupancy Sensors, and Wire Management systems. Their product lines span electrical components, control devices, and industrial automation accessories designed for diverse applications in commercial and industrial settings.

What accessories are available for NSi Industries products?

NSi Industries offers a range of accessories for their product lines, including photocontrol accessories like replacement caps, mounting brackets, and receptacles. Specific accessories include shorting caps, open caps, 3-pin and 7-pin receptacles, and utility mounting brackets for conduit photocontrols. For specialized applications, NSi recommends contacting their customer service team to discuss custom accessory needs.