Eaton 521 HDG Rigid/IMC Clamp - Hot Dip Galvanized
Part Number: 521 HDG
Quick Summary
The 521 HDG rigid/IMC clamp supports 6-inch rigid or IMC conduit in industrial electrical installations. In harsh environments, corrosion resistance and secure mounting under vibration are common challenges. UL certification for rigid-IMC clamps, plus ordinary/non-hazardous area classification and a hot dip galvanized finish, provide safety, compliance, and long-term performance. Its 14 inch length and malleable iron construction deliver dependable support with reduced maintenance throughout the life of the installation. This solution pairs with Eaton Crouse-Hinds conduit hardware and other industrial electrical components to optimize installation efficiency and lifecycle cost.
Product Information
Extended Description
521 HDG Eaton Crouse-Hinds: Eaton Crouse-Hinds series rigid/IMC clamp, Malleable iron, Hot dip galvanized finish, 6"
Product Name
Eaton Crouse-Hinds series rigid/IMC clamp
Catalog Number
521 HDG
Product Length/Depth
14 in
Product Height
5.8 in
Product Width
3.3 in
Product Weight
6.9 lb
UPC
662277059589
Area classification
Ordinary/Non-Hazardous Locations
Conduit type
Rigid/IMC
Trade size
6"
Material
Malleable iron
Finish
Hot dip galvanized
Crouse-Hinds series Hot Dip Galvanized Couplings, Clamps and Clampbacks - Rigid-IMC catalog page
Clamps, Straps, Clampbacks and Hangers - Rigid-IMC UL certification
Clamps, Straps, Clampbacks and Hangers - Rigid-IMC UL certification
Eaton Specification Sheet - 521 HDG
Feature: Material and finish use malleable iron with a hot dip galvanized coating. Business Impact: Provides robust mechanical strength and superior corrosion resistance for outdoor and damp environments, reducing maintenance cycles. Application: Ideal for 6 inch trade size rigid/IMC conduit installations in non-hazardous locations. Feature: Precise dimensions and weight—14 in length, 5.8 in height, 3.3 in width, 6.9 lb weight. Business Impact: Delivers predictable fit and handling, enabling faster on-site mounting and safer load distribution. Application: Suitable for retrofit or new builds in industrial facilities requiring a stable clamp for sizeable conduits. Feature: Conduit type compatibility—Rigid/IMC. Business Impact: Ensures a single hardware family can support multiple conduit standards, reducing inventory diversity and maintenance costs. Application: Use across plant sections with both rigid and IMC conduit runs. Feature: Certifications and location rating—Ordinary/Non-Hazardous Locations with UL certification for rigid-IMC clamps. Business Impact: Enhances regulatory compliance and field acceptance, lowering risk during audits. Application: Approved for standard industrial environments and non-hazardous areas. Feature: Catalog information and compatibility—Catalog number 521 HDG with a hot dip galvanized finish. Business Impact: Streamlines procurement and ensures consistent performance across Eaton Crouse-Hinds conduit hardware. Application: Simple integration into existing Eaton electrical component ecosystems in factories and facilities.
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FAQs
To install, align the clamp with the conduit, position the clamp on the support structure, insert the conduit into the clamp, and tighten the securing hardware to specification. Verify proper seating and clearance, then check for vibration resistance. This clamp is designed for straightforward integration with standard mounting hardware used in industrial installations.
The clamp is fabricated from malleable iron and finished with hot dip galvanizing. This combination offers high mechanical strength and excellent corrosion resistance, especially in outdoor or damp environments. The finish extends service life in ordinary locations, reducing replacement frequency and maintenance costs over the project lifecycle.
Yes. The clamp carries an Ordinary/Non-Hazardous Location classification and utilizes a hot dip galvanized finish, which provides enhanced corrosion protection for outdoor installations or areas with exposure to moisture. Always ensure the application aligns with UL certifications and local codes for non-hazardous environments.
The 521 HDG clamp is UL certified for rigid-IMC conduit hardware. Listings cover both the United States and Canada, confirming compliance for conduit and cable hardware in non-hazardous industrial settings. Refer to the UL certification pages for exact listing numbers and scope.
Using the 521 HDG clamp provides durable, corrosion-resistant conduit support with a known 6-inch trade size, simplifying procurement and installation. The UL-certified, outdoor-ready finish reduces maintenance needs and lifecycle costs, while compatibility with Eaton Crouse-Hinds components shortens lead times and improves overall project reliability.