TSI INOX Conduits presents our premium Stainless Steel Rigid Nipple, a versatile and essential component for professional electrical raceway systems. Manufactured in strict accordance with UL 6A standards and available in premium 304 stainless steel and 316 stainless steel grades, our rigid nipples provide secure, corrosion-resistant connections for extending conduit systems, connecting enclosures, and bridging gaps in electrical installations.
Whether you are connecting conduit to junction boxes, linking enclosures side-by-side, or creating short raceway runs where full conduit lengths are impractical, TSI's stainless steel rigid nipples deliver the precision, durability, and sanitary finish your project demands.
Each nipple features precision-cut NPT (National Pipe Taper) male threads on both ends, ensuring secure, leak-resistant connections with standard rigid conduit, couplings, 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 nipples 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 nipples that rely on zinc coatings, our stainless steel nipples 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.
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.
Stainless steel rigid nipples maintain structural integrity across a wide temperature range, from -150°F to 1600°F, making them suitable for high-heat zones and fire-resistive applications.
Factory-threaded and thoroughly cleaned, our nipples are ready for immediate installation with standard tools and installation practices, reducing labor time and simplifying field assembly. No special tools or complicated maintenance procedures are required.
| 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) |
| Thread Type | NPT (National Pipe Taper) – Male threads both ends |
| Length Tolerances | ± 1/16" (1.59mm) |
| Trade Sizes | ½" through 4" (16mm through 103mm) |
Our precision-manufactured stainless steel rigid nipples meet stringent dimensional requirements to ensure proper fit and reliable connections:
| Parameter | Tolerance |
|---|---|
| Outside Diameter (½" – 1½") | ± 0.015 in (0.38mm) |
| Outside Diameter (2" – 4") | ± 1% |
| Wall Thickness | ± 12.5% |
| Length | ± 1/16" (1.59mm) |
| Threads | Minus 1/+0 |
TSI offers a comprehensive range of standard nipple lengths to meet diverse installation requirements:
| Trade Size | Available Lengths (inches) |
|---|---|
| ½" | Close, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12 |
| ¾" | Close, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12 |
| 1" | Close, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12 |
| 1¼" | Close, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12 |
| 1½" | Close, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 10, 12 |
| 2" | Close, 3, 3.5, 4, 5, 6, 8, 10, 12 |
| 2½" | Close, 3, 3.5, 4, 5, 6, 8, 10, 12 |
| 3" | Close, 3, 3.5, 4, 5, 6, 8 |
| 4" | Close, 3.5, 4, 5, 6, 8 |
| Custom lengths available upon request | |
Our 304 stainless steel rigid nipples offer excellent corrosion resistance and durability for general industrial and commercial applications. The 304 alloy provides reliable performance in food processing, pharmaceutical, and manufacturing environments where resistance to atmospheric corrosion and mild chemicals is required. The polished finish enhances resistance to pitting and bacterial corrosion, making it suitable for CIP (clean-in-place) and SIP (sterilize-in-place) systems.
For the most demanding corrosive environments, our 316 stainless steel rigid nipples 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, marine installations, and pharmaceutical applications.
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:
TSI stainless steel rigid nipples are essential for a wide range of applications:
Connecting sections of rigid conduit
Connecting conduit to junction boxes, panelboards, and enclosures.
Connecting two boxes side-by-side or back-to-back
Bridging gaps where full conduit lengths are impractical
Providing clean, corrosion-resistant connections to motors and machinery
Sanitary, cleanable connections for hygienic zones
Resisting aggressive chemical exposure
Withstanding saltwater and high-humidity conditions
Durable connections in demanding environments
Our TSI stainless steel rigid nipples 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 (when specified)
RoHS Compliant – Restriction of Hazardous Substances
TSI INOX Conduits provides a comprehensive stainless steel rigid conduit system for unified specification:
TSI INOX Conduits manufactures every nipple 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 INOX Conduits specializes in stainless steel conduit solutions for demanding industries, including power generation, pharmaceutical, and food processing, ensuring our products meet the unique requirements of each sector.
NPT (National Pipe Taper) per ANSI/ASME B1.20.1
½", ¾", 1", 1¼", 1½", 2", 2½", 3", 4"
Individually bagged or bulk packaged to protect surface finish
Special lengths, finishes, or packaging available upon request
Contact us today to discuss your requirements, request samples, or receive a competitive quote for bulk stainless steel rigid nipples.
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