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NSI Industries 250-MSRT - Bridgeport Fittings Mighty-Seal 1/2 inch EMT Connectors are used to connect a 1/2 inch EMT raceway to a box, device or enclosure. The 250MSRT 1/2 inch Mighty-Seal« connector is UL listed for use in wet locations. Raintight. Patented

NSI Industries 250-MSRT Bridgeport Fittings Mighty-Seal 1/2 inch EMT Connectors are used to connect a 1/2 inch…

UPC: 781747172501


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Contact for Pricing

Minimum Qty: 25

Multiplier: 25

*Contact for lower quantities*

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The NSI Industries 250-MSRT Mighty-Seal® 1/2" EMT Connector delivers a fast, tool-free solution for connecting 1/2" Electrical Metallic Tubing (EMT) to boxes, devices, or enclosures. Engineered for speed and reliability, this patented connector installs in seconds by simply inserting a deburred EMT end into the fitting and rotating slightly until it reaches the end stop. No tools are required, reducing installation time by up to 75% compared to traditional threaded connectors. Its zinc die-cast construction with ball-burnished finish ensures durability and corrosion resistance, while the integrated nylon insulator protects conductors during wire pulling and prevents thread damage. The locknut design ensures a positive bond between the conduit and fitting, as well as between the fitting and the enclosure, guaranteeing ground continuity. 18, NFPA 70-1999 (ANSI), NEMA FB1, and Federal Specification W-F-408, this connector is a robust, reusable solution for secure EMT terminations in commercial, industrial, and residential electrical systems.
  • Tool-free push-on installation for EMT raceways
  • Zinc die-cast construction with ball-burnished finish for durability
  • Integrated 105°C-rated nylon insulator protects conductors
  • Reusable design with positive locknut for ground continuity

Specifications

Application
Used to join EMT to box or enclosure. Concrete tight/raintight
Connection Type
Push-on
Connection Type
Push-in
Connector Type
PUSH-EMT®
Finish
Ball burnish
Insulation
False
Material
Steel (electro-zinc plated)
Material Quality
Zinc Die Cast
Mounting Type
Threaded (locknut)
Nema Rating
Type 4X
Nema Rating
NEMA FB1
Series
Mighty-Seal
Size
1/2 IN
Special Features
Connectors assembled with knockout gasket, no separate pieces to buy and stock
Standard
cULus
Trade Size
1/2
Trade Size
1/2 in.
Type
Connector
Package Weight (Imperial)
0.170 L
Package Weight (Metric)
0.077 kg
3/4" Raintight PUSH-EMT® Coupling

261-MSRT

3/4" Raintight PUSH-EMT® Coupling
Connector, Non-Insulated Compression, Conduit Size 3/4 Inch, Length 1-11/32 Inch, Width 1-5/32 Inch, Die Cast Zinc, For use with EMT Conduit, Sold by Each

TC212SC-1

Connector, Non-Insulated Compression, Conduit Size 3/4 Inch, Length 1-11/32 Inch, Width 1-5/32 Inch, Die Cast Zinc, For use with EMT Conduit, Sold by Each
Conduit connection plate with hardware for 3/4 in. electrical metallic tubing (EMT) connectors. The sheet identifies the product as CPC75EG. No material, finish, or dimensional attributes are printed on the sheet beyond the 3/4 size reference in the title.

CPC75EG

Conduit connection plate with hardware for 3/4 in. electrical metallic tubing (EMT) connectors. The sheet identifies the product as CPC75EG. No material, finish, or dimensional attributes are printed on the sheet beyond the 3/4 size reference in the title.
Mighty-Seal Push-EMT zinc die cast 1/2" connector with 105 Degree C insulated throat.

250-MSRTI

Mighty-Seal Push-EMT zinc die cast 1/2" connector with 105 Degree C insulated throat.
3/4" Raintight Compression Connector, Insulated - Made in the U.S.

251-RTI2US

3/4" Raintight Compression Connector, Insulated - Made in the U.S.
3/4" Raintight Compression Connector, NPT THREAD-Made in the U.S.

251-RT2US

3/4" Raintight Compression Connector, NPT THREAD-Made in the U.S.
1/2" Raintight Compression Connector, NPT THREAD-Made in the U.S.

250-RT2US

1/2" Raintight Compression Connector, NPT THREAD-Made in the U.S.
3/4" DRY PUSH-EMT® Coupling

261-MB

3/4" DRY PUSH-EMT® Coupling

Frequently Asked Questions

Is the 250-MSRT connector suitable for wet locations?

Yes, the 250-MSRT connector is UL listed for use in wet locations.

What is the trade size of the 250-MSRT connector?

The trade size of the 250-MSRT connector is 1/2 inch.

How is the 250-MSRT connector installed?

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

What are the certifications for the 250-MSRT connector?

The connector has certifications including UL, cULus, and complies with Federal Specification A-A-50553.

What material is the 250-MSRT connector made of?

The 250-MSRT connector is made of zinc die cast.

How do you remove the 250-MSRT connector?

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

Where is the 250-MSRT connector manufactured?

The 250-MSRT connector is manufactured in the USA.

What is the finish of the 250-MSRT connector?

The finish of the 250-MSRT connector is ball burnished.

Can the 250-MSRT connector be reused?

Yes, the fitting can be reassembled in the reverse order of removal and reused.

What is the standard package quantity for the 250-MSRT?

The standard package quantity for the 250-MSRT is 250.

How to Install the Mighty-Seal™ Push-EMT™ Connector

This guide provides step-by-step instructions for installing the Mighty-Seal™ Push-EMT™ Connector for use in wet locations.

Estimated time: 30m

Tools needed:

Screwdriver, Reaming/deburring tool

Supplies needed:

Mighty-Seal™ Push-EMT™ Connector, Knockout gasket, Locknut

  1. Prepare the EMT

    Cut the Electrical Metallic Tubing (EMT) squarely and thoroughly remove all burrs using a reaming/deburring tool to ensure an evenly chamfered outer edge.

  2. Install the connector

    In one motion, slightly rotate and firmly push the Mighty-Seal™ Push-EMT™ Connector onto the EMT until it reaches the conduit stop (minimum of ½ inch). Do not rotate the EMT more than a ¼ turn.

  3. Secure the connector

    Remove the serrated locknut and position the knockout gasket on the outside of the enclosure. Insert the fitting into the knockout and tighten the locknut hand-tight plus ¼ turn.

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