Overview
The Hubbell 5271-0 weatherproof closure plug is a proven solution for sealing unused 1″ NPT openings on electrical boxes, extension adapters, and cluster covers. Built from die-cast zinc in a gray metallic finish, the 5271-0 protects against moisture, corrosion, and contamination in outdoor, wet, and damp environments. Each unit comes as part of a 4-pack per bag, making it cost-effective for contractors and maintenance professionals.
Key Features
- 1″ NPT thread size—drops directly into standard electrical box openings
- Die-cast zinc construction with corrosion-resistant gray metallic finish
- Weatherproof design rated for outdoor and wet-location applications
- UL and cULus listed for safety compliance
- Compatible with Bell weatherproof boxes, extension adapters, and cluster covers
- Nonmetallic material body ensures long service life without rust
Technical Specifications
- Part Number: 5271-0
- Manufacturer: Hubbell / Bell
- Thread Size: 1″ NPT
- Material: Die-cast zinc, nonmetallic
- Color: Gray
- Height: 1.29″
- Width: 1.29″
- Depth: 0.29″
- Weight (per plug): 0.131 lb
- Packaging: 4 plugs per polybag
- UPC: 050169527108
- Certifications: UL Listed, cULus Listed
Typical Applications
The Hubbell 5271-0 is ideal for:
- Sealing unused knockouts on weatherproof outlet boxes
- Covering openings on extension adapters in wet locations
- Protecting cluster covers from moisture ingress
- Outdoor electrical installations requiring environmental protection
- Corrosive environments where stainless or corrosion-resistant fasteners are required
- Maintenance and repair of existing Bell weatherproof systems
Compatibility & Replacements
Compatible With
- Bell weatherproof boxes and enclosures
- Bell extension adapters
- Bell cluster covers
- 1″ NPT threaded electrical box openings
Replaces / Drop-In Replacement For
- Hubbell-Raco 5271-0 (OEM part)
- BELL 5271-0 (brand equivalent)
Works With
- Bell outdoor electrical systems
- Standard weatherproof electrical boxes
- Extension adapter systems with 1″ NPT threads
- Outdoor and wet-location electrical installations
