Stainless Steel Locknut UL 514B

Premium SS316 Locknuts for Secure Conduit Connections and Equipment Bonding

TSI INOX Conduits presents our premium Stainless Steel Locknut, an essential component for securing and bonding threaded rigid conduit and IMC to enclosures. Manufactured from premium SS316 stainless steel with a vibration polished finish, our locknuts provide reliable, corrosion-resistant fastening for demanding applications.

Locknuts are used to connect externally threaded rigid conduit or IMC to a threadless opening in an electrical box or enclosure, providing a secure mechanical connection while effectively bonding the conduit or connector to the enclosure. Their serrated teeth grip the knockout and prevent vibrations that can loosen the connection. Whether you are installing in food processing facilities, chemical plants, wastewater treatment facilities, or marine environments, TSI's stainless steel locknuts deliver the quality, durability, and code compliance your project demands.

Stainless Steel Locknut - UL 514B

Key Features

Secure, Vibration-Resistant Connection

TSI locknuts are specially designed to provide extended reach for clamping on thin boxes and enclosures and to permit tightening from outside the box . The heavy-stock design with specialized teeth grips the knockout and prevents loosening under vibration or mechanical stress

Superior Corrosion Resistance

Manufactured from Type 316 stainless steel to meet any stringent sanitary condition, our locknuts provide:

  • Superior corrosion resistance – Exceptional protection against chlorides, acids, and saline atmospheres
  • Molybdenum-enhanced durability – Resists pitting and crevice corrosion in aggressive environments
  • Sanitary properties – Suitable for food processing, pharmaceutical, and hygienic applications
  • Long service life – Eliminates lifecycle costs associated with corrosion-related failures

Vibration Polished Finish

The vibration polished finish provides:

  • Enhanced corrosion resistance – Smooth surface minimizes crevice corrosion
  • Easy cleaning – Sanitary design suitable for CIP (clean-in-place) systems
  • Professional aesthetic – Bright, uniform "brite" finish that is modern and attractive
  • Enhanced resistance to pitting and bacterial corrosion – Corrosion resistance

Positive Grounding / Bonding

TSI locknuts provide:

  • Positive ground continuity – Serrated teeth bite into the box or enclosure, providing a positive ground
  • Vibration resistance – Prevents loosening of the connection
  • Reliable bonding – Effectively bonds conduit or connector to box or enclosure

Furnished Features

  • Heavy-stock construction with specialized locking teeth for secure fastening
  • Reinforced tabs ensure a tight, vibration-resistant fit that won't loosen under pressure or movement
  • NPSL – straight threads for universal compatibility

Tightens Without Deformation

TSI locknuts are engineered to tighten without deformation, ensuring consistent performance and reliable installation.

Key Specifications

Specification Details
Standard UL 514B – Conduit, Tubing, and Cable Fittings
CSA Standard CSA C22.2 – Enclosures for Electrical Equipment
Material 316SS Stainless Steel
Finish Vibration Polished / "Brite" Finish
Conduit Types Rigid and IMC (Intermediate Metallic Conduit)
Thread Type NPT (National Pipe Taper) – Internal Threads
Special Features Tightens Without Deformation; Serrated Locking Teeth
Application Threaded Conduit to Threadless Opening in Box or Enclosure
Trade Sizes ½" through 4"

Material Specifications

Component Material Grade Finish
Body Stainless Steel 316SS Vibration Polished

Application

TSI locknuts are essential for:

Industries Served

Food & Beverage Processing

Sanitary washdown environments

Chemical Processing Plants

Acid fumes and caustic environments

Wastewater Treatment Facilities

Moisture and chemical resistance

Marine & Offshore Installations

Saltwater and high-humidity conditions

Pharmaceutical & Cosmetics

Clean rooms and hygienic zones

Refining & Extraction Sites

Harsh industrial environments

Petrochemical

Hydrocarbon and chemical exposure

Industrial Electrical Systems

Provides dependable conduit fastening under vibration or mechanical stress

Conduit System Functions

  • Connecting externally threaded conduit to a threadless opening in a box or enclosure
  • Securing threaded rigid conduit and IMC to electrical enclosures
  • Bonding conduit or connector to box or enclosure
  • Preventing vibratory loosening of connections

Complete System Availability

TSI INOX Conduits provides a comprehensive stainless steel conduit system:

  • Rigid Stainless Steel Conduit (RSSC) – UL 6A certified
  • Stainless Steel Rigid Couplings – Standard, three-piece, and reducing configurations
  • Stainless Steel Locknuts – For securing conduit to enclosures
  • Stainless Steel Conduit Bushings – Standard and grounding configurations
  • Stainless Steel Rigid Nipples – Threaded both ends, various lengths
  • Stainless Steel LT Conduit Connectors – Straight, 45°, and 90° configurations
  • Stainless Steel Watertight Hubs – Standard and grounding configurations
  • Stainless Steel Conduit Bodies – Complete range of configurations
  • Hazardous Location Products – EYS, UNY, UNF, REA, PLG, GUA Series

Why Choose TSI INOX Conduits?

Uncompromising Quality

TSI INOX Conduits manufactures every locknut using premium 316 stainless steel and state-of-the-art production processes, ensuring consistent dimensions, accurate threading, and flawless vibration polished finishes in every product.

Global Supply

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.

Technical Expertise

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.

Industry Specialization

TSI INOX Conduits specializes in stainless steel conduit solutions for demanding industries, including food processing, pharmaceutical, and chemical, ensuring our products meet the unique requirements of each sector.

Ordering Information

Type

Conduit Locknut

Material

316SS Stainless Steel

Finish

Vibration Polished / "Brite" Finish

Thread Standard

NPT (National Pipe Taper) – Internal Threads

Conduit Types

Rigid and IMC

Trade Sizes Available

½", ¾", 1", 1¼", 1½", 2", 2½", 3", 4"

Standards

UL 514B, CSA C22.2, NEMA FB-1

Contact Us

Partner with TSI INOX Conduits for your next project

Contact us today to discuss your requirements, request samples, or receive a competitive quote for bulk stainless steel locknuts.


TSI INOX Conduits

Engineered for the Toughest Environments. Trusted Worldwide.

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