TSI INOX Conduits presents our premium Stainless Steel Rigid Coupling, an essential component for assembling reliable, code-compliant electrical raceway systems. Manufactured in strict accordance with UL 6A standards, our stainless steel rigid couplings provide secure, leak-resistant connections between lengths of rigid stainless steel conduit, ensuring continuity of grounding path and mechanical protection in even the most demanding environments.
Whether you're extending conduit runs, making repairs, or transitioning between conduit sections, TSI's stainless steel rigid couplings deliver the precision, durability, and corrosion resistance your project demands.
TSI stainless steel rigid couplings are essential for:
Connecting straight sections to create longer raceways.
Replacing damaged sections of conduit.
Connecting elbows, conduit bodies, and other fittings.
Creating watertight joints in direct burial applications.
Maintaining explosion-proof integrity in classified areas.
Providing sanitary, cleanable connections.
| Specification | Details |
|---|---|
| Standard | UL 6A – Electrical Rigid Metal Conduit – Steel |
| Material Options | 304 Stainless Steel (AISI 304) or 316 Stainless Steel (AISI 316) |
| Finish | Pickling and Passivating (Interior) / Polished #240 (Exterior) |
| Trade Sizes | ½" through 6" (16mm through 155mm) |
| Thread Type | NPT (National Pipe Taper) – Female threads both ends |
| Length | Standard lengths per trade size |
Our precision-manufactured stainless steel rigid couplings meet stringent dimensional requirements to ensure proper fit and reliable connections:
| Parameter | Tolerance |
|---|---|
| Outside Diameter (½" – 1½") | ± 0.050 in (1.2mm) |
| Outside Diameter (2" – 6") | ± 2% |
| Wall Thickness | ± 12.5% |
| Thread Depth | Full threads per ANSI/ASME B1.20.1 |
Our 304 stainless steel rigid couplings offer excellent corrosion resistance and durability for general industrial and commercial applications. The 304 alloy provides reliable performance in food processing, pharmaceutical, manufacturing, and atmospheric environments where resistance to mild chemicals and moisture is required.
For the most demanding corrosive environments, our 316 stainless steel rigid couplings deliver superior protection with molybdenum-enhanced alloy composition. The 316 grade provides exceptional resistance to chlorides, acids, saline atmospheres, and aggressive chemicals, making it the preferred choice for offshore platforms, chemical processing plants, wastewater treatment facilities, and marine installations .
Our rigorous pickling and passivation process removes surface contaminants, welding scale, and iron particles while promoting the formation of a protective chromium oxide layer . This enhances the interior corrosion resistance, ensures smooth conductor pulling, and maintains a clean raceway free from particulate contamination .
The exterior #240 polished finish provides a smooth, bright, and aesthetically pleasing surface that:
Our TSI stainless steel rigid couplings meet or exceed the following international standards:
UL 6A – Electrical Rigid Metal Conduit – Steel
cUL 6A – Canadian Electrical Code compliance
ANSI C80.1 – American National Standard for Electrical Rigid Steel Conduit
ANSI/NFPA 70 – National Electrical Code (NEC) Article 344 – Rigid Metal Conduit
CSA C22.1 – Canadian Electrical Code, Part I
NEMA – National Electrical Manufacturers Association standards
NSF/ANSI 169 – Certified for food equipment applications
RoHS Compliant – Restriction of Hazardous Substances
TSI INOX Conduits provides a comprehensive stainless steel rigid conduit system for unified specification:
Each coupling features precision-cut NPT (National Pipe Taper) female threads on both ends, ensuring secure, leak-resistant connections with standard rigid conduit, elbows, and conduit bodies . The tapered thread design provides a progressively tighter fit as connections are made, creating a mechanically sound and electrically continuous joint.
Stainless steel rigid couplings provide a reliable, low-impedance equipment grounding conductor path, maintaining electrical continuity throughout the raceway system without the need for bonding jumpers (when installed per NEC requirements).
Unlike standard carbon steel couplings that rely on zinc coatings, our stainless steel couplings provide inherent corrosion resistance throughout the entire component—not just on the surface. This ensures long-term performance in aggressive environments where coating failure would lead to premature failure.
Designed to mate perfectly with TSI stainless steel rigid conduit, elbows, and conduit bodies, our couplings ensure a complete, seamless raceway system from a single source.
The smooth, polished surface and passivated interior create a sanitary connection point suitable for food processing, pharmaceutical, and cleanroom applications where bacterial growth and contamination must be minimized.
Factory-threaded and thoroughly cleaned, our couplings are ready for immediate installation with standard tools and installation practices, reducing labor time and simplifying field assembly.
TSI INOX Conduits manufactures every coupling using premium raw materials and state-of-the-art production processes, ensuring consistent dimensions, accurate threading, and flawless finishes in every product.
Based in India with a worldwide export network, TSI delivers stainless steel electrical conduit solutions to projects across North America, Europe, the Middle East, and beyond.
Our engineering team provides application assistance, code compliance guidance, and custom solutions to meet your exact project specifications—from material selection to installation best practices.
TSI offers high-quality stainless steel rigid couplings at competitive prices, delivering exceptional value without compromising on performance or compliance.
NPT (National Pipe Taper) per ANSI/ASME B1.20.1
½", ¾", 1", 1¼", 1½", 2", 2½", 3", 4", 5", 6"
Individually bagged or bulk packaged to protect surface finish
Special finishes, lengths, or packaging available upon request
Contact us today to discuss your requirements, request samples, or receive a competitive quote for bulk stainless steel rigid couplings.
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