
Contact for Pricing
Minimum Qty: 25
Multiplier: 25
*Contact for lower quantities*
Overview
- Tool-free push-in installation saves up to 75% time vs. traditional methods
- Compatible with smooth or corrugated aluminum-sheathed and steel MC cable
- Unique saddle design ensures secure cable retention and high-quality bonding
- Removable bushing design reduces inventory needs across multiple cable sizes
- U.L. Listed as a grounding means under NEC 350-5 for dry locations
Specifications
Application | The 251-MBI is used to connect a properly deburred length of EMT raceway to a box device, panelboard, or similar electrical enclosure. Simply push the fitting onto raceway with a slight twist. Remove the fitting by unthreading it from conduit end. No tools are required. Concrete Tight. Patented |
Connection Type | Push-in |
Connector Type | PUSH-EMT® |
Finish | Ball burnish |
Insulation | Insulated Throat |
Material | Steel/Malleable Iron |
Material Quality | Zinc Alloy body and locknut with steel internal components |
Series | Mighty-Bite |
Size | 3/4 IN |
Size | 3/8", 1/2", 3/4" and larger |
Special Features | Concrete tight |
Standard | cULus |
Temperature Rating, Maximum | 221.00000 F |
Temperature Rating, Maximum | 105 °C |
Temperature Rating, Maximum | 221 F |
Temperature Rating, Maximum | 105 C |
Temperature Rating, Minimum | 221 F |
Temperature Rating, Minimum | 105 C |
Temperature Rating, Minimum | 221.00000 F |
Trade Size | 3/4 in. |
Type | Connector |
Package Weight (Imperial) | 0.140 L |
Package Weight (Metric) | 0.064 kg |
Similar Products

251-RTI2
Special Features: Raintight
Temperature Rating, Maximum: 194.00000 F
Temperature Rating, Minimum: 194.00000 F
Frequently Asked Questions
Is the 251-MBI connector concrete tight?
Yes, the 251-MBI connector is designed to be concrete tight.
How is the 251-MBI connector installed?
The connector is installed by pushing it onto the raceway with a slight twist; no tools are required.
What is the purpose of the 251-MBI connector?
The 251-MBI is used to connect a properly deburred length of EMT raceway to a box device, panelboard, or similar electrical enclosure.
What is the trade size of the 251-MBI connector?
The trade size of the 251-MBI connector is 3/4 inch.
How do you remove the 251-MBI connector?
To remove the connector, simply unthread it from the conduit end.
What materials are used in the 251-MBI connector?
The connector features a zinc alloy body and locknut with steel internal components.
What certifications does the 251-MBI connector have?
The connector is certified under CSA, UL, and meets NEMA standards.
Where is the 251-MBI connector manufactured?
The 251-MBI connector is manufactured in the USA.
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.




