Eaton Crouse-Hinds UNF406 Union - Group B rated
Part Number: UNF505 SA
Quick Summary
Eaton Crouse-Hinds UNF406 union is a rugged rigid/IMC conduit connector designed for hazardous locations in industrial facilities. In the field, unreliable terminations, misalignment, or non-compliant hardware can drive downtime, costly rework, and safety risks, so selecting a proven, code-compliant solution is essential. This union meets NEC/CEC requirements and carries UL certifications for Class I, Division 1 and 2, Class II, Division 1 and 2, and Class III environments, helping you simplify audits and improve safety. Designed for 1-1/4 inch trade size and rigid/IMC conduit, it integrates with compatible fittings to streamline installation, reduce inventory complexity, and support predictable maintenance planning across your facilities.
Product Information
Extended Description
UNF505 SA Eaton Crouse-Hinds: Eaton Crouse-Hinds series UNF union, Rigid/IMC, Female, Copper-free aluminum, 1-1/2"
Product Name
Eaton Crouse-Hinds series UNF union
Catalog Number
UNF505 SA
UPC
782274101866
Product Length/Depth
2.59 in
Product Height
3.06 in
Product Width
3.06 in
Product Weight
0.75 lb
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class I, Division 1 Class I, Division 2 Class II, Division 1 Class II, Division 2 Class III
Conduit type
Rigid/IMC
Gender
Female
Material
Copper-free aluminum
Trade size
1-1/2"
Crouse-Hinds series Explosionproof Conduit Unions, Elbows and Tees catalog page
Explosionproof Conduit Unions, Elbows and Tees UL certification
Explosionproof Conduit Unions, Elbows and Tees UL certification
Eaton Specification Sheet - UNF505 SA
Feature: Feraloy iron alloy construction provides high strength and exceptional wear resistance in demanding environments. Business Impact: enhances overall durability and reduces risk of damage from impact, vibration, or corrosion, delivering longer service life in hazardous locations. Application: explosion-proof conduit unions in refineries, chemical plants, and mining sites. Feature: Female 1-1/4 inch trade-size union design ensures straightforward mating with standard rigid/IMC conduit. Business Impact: simplifies installation, minimizes thread cross-matching errors, and accelerates commissioning. Application: field terminations where rapid, reliable connections are needed. Feature: Group B rated is certified for hazardous locations, improving compliance confidence and reducing audit overhead. Business Impact: lowers risk exposure and supports safer operation across production lines. Application: facilities subject to stringent safety standards and regulatory oversight. Feature: Compact dimensions and ergonomic weight (2.25 in length, 2.94 in width/height, 1.72 lb) enable easier handling and installation in tight spaces. Business Impact: reduces labor time and fatigue on crews, improving installation quality. Application: electrical rooms and energized panels with space constraints. Feature: NEC/CEC compliance along with UL certifications for hazardous locations provides a trusted certification footprint. Business Impact: streamlines procurement, reduces supplier fragmentation, and supports regulatory alignment. Application: project specs and maintenance programs requiring proven, auditable compliance.
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FAQs
UNF406 uses a female union design compatible with standard 1-1/4 inch rigid/IMC conduit. To install, align the conduit, ensure threads are clean, hand-tighten before final torque per manufacturer guidelines, and verify the gasket seating for a tight, explosion-proof seal. Using the correct sealant or thread lubricant as recommended by Eaton helps prevent galling and ensures long-term integrity.
UNF406 is rated for Hazardous/Classified Locations per NEC/CEC standards and offers UL-certified protection for Class I, Division 1 and 2; Class II, Division 1 and 2; and Class III environments. These ratings mean the union is approved for use in atmospheres with flammable gases, vapors, dust, or fibers, simplifying compliance and reducing risk during commissioning and operation.
Yes. The UNF406 union uses Feraloy iron alloy and is Group B rated for hazardous locations, making it appropriate for oil and gas, chemical processing, and related sectors. Its explosion-proof construction and rigid/IMC compatibility deliver robust performance in vibration-prone or corrosive environments while meeting NEC/CEC and UL criteria.
UNF406 adheres to NEC/CEC standards for hazardous locations and is UL-certified for Class I, Division 1 and 2, Class II, Division 1 and 2, and Class III environments. The product page also references UL certification listings and CSA Group verifications, providing a broad compliance footprint for regulated projects.
The combination of a durable Feraloy iron alloy body, Group B rating, and a proven rigid/IMC interface yields long-term reliability with fewer maintenance interventions. This reduces downtime, extends service life in harsh environments, and simplifies spares management, ultimately improving total cost of ownership for facilities with frequent maintenance cycles.