Thomas & Betts 8621-NSB Threadless Connector NSB

Description:

The Thomas & Betts 8621 Threadless Connector NSB is used to connect and effectively bond 2 inch rigid metal conduit (RMC) or intermediate metal conduit (IMC) to electrical boxes and enclosures without requiring conduit threads. Commonly installed in industrial facilities, manufacturing plants, commercial buildings, utility installations, and electrical distribution systems, this threadless connector provides a secure mechanical connection and dependable grounding continuity. Maintenance teams and electrical contractors use this fitting for repair, retrofit, expansion, and replacement of rigid conduit installations. 

Applications:

The Thomas & Betts 8621 is designed to terminate or couple 2 inch threadless rigid metal conduit and IMC in electrical raceway systems. Its malleable iron body and split case-hardened steel ring with diagonal serrations provide a permanent, concrete-tight connection while ensuring positive electrical bonding. The connector is ideal for switchgear, motor control centers, industrial machinery, panelboards, process equipment, and commercial electrical installations where conduit threading is impractical or unnecessary.

Technical Specifications:

• Manufacturer Part Number (MPN): 8621
• Brand: Thomas & Betts (ABB) – T&B Rigid Fittings
• Product Type: Threadless Connector
• Trade Size: 2 in.
• Conduit Type: Rigid Metal Conduit (RMC) / Intermediate Metal Conduit (IMC)
• Connection Type: Threadless
• Throat Type: Non-Insulated
• Material: Malleable Iron Body with Case-Hardened Steel Ring and Steel Locknut
• Finish: Electro Zinc-Plated Chromate Coating
• Diameter: 3-1/4 in.
• Overall Length: 2-13/16 in.
• Thread Length: 27/32 in.
• Construction: Concrete-Tight
• Application: Connects and effectively bonds threadless RMC/IMC to electrical boxes and enclosures or couples threadless conduit sections
• Standards: UL 514B (UL File E23018), CSA C22.2, Federal Specification WF-408, NEMA, NFPA 70
• Compliance: RoHS 3 Compliant, REACH Compliant, TSCA Section 6(h) Compliant
• UPC: 786210086217
• Features: Split steel ring with diagonal serrations for positive grounding, permanent mechanical connection, eliminates conduit threading, corrosion-resistant construction, and approved for concrete-tight installations.

Common Replacements:

• Thomas & Betts 8521
• Thomas & Betts 8721
• Thomas & Betts 8623