1-Gang Die-Cast Aluminum Box 3×1/2" Hubs Deep | UL 514A NEMA 3R/4
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SKU: 210-31021
372 in stock
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The Conversions Tech Precision Die-Cast 1-Gang Electrical Box is a deep-profile enclosure engineered for single-device installations including switches, GFCIs, receptacles, and sensors. The A380-grade die-cast aluminum construction with UV-stable polyester powder-coat finish (RAL 7035 Gray) delivers mechanical strength and corrosion resistance for indoor and outdoor applications. Rated UL 514A, UL 50E, and NEMA 3R/4, this box suits residential, commercial, and industrial environments where weatherproofing and code compliance are required.
Specifications
- Material: A380 Die-Cast Aluminum, 0.05% max porosity, seamless single-piece shell
- Finish: Polyester Powder-Coat, RAL 7035 Gray, ≥2.5 mil thickness, 1,000-hour salt-spray rated
- Envelope: 2.80″ W × 4.50″ H × 2.70″ D (±0.010″ machining tolerance)
- Internal Volume: 18.3 in³ (exceeds NEC 314.16(A) for 1-gang classification)
- Hub Size/Thread: ½″–14 NPSM, thread relief with integrated O-ring groove
- Hub Count/Locations: 3 total — (1) back, (2) sidewalls; includes aluminum closure plugs
- Ground Provision: M4 × 0.7 mm green screw, <0.05 Ω verified bonding path
- Mounting: #10-24 stainless lugs, 3.50″ on-center, captive hardware
- Compliance: UL 514A, UL 50E, NEMA 3R/4, RoHS III
Cross-Reference: 210-31021
| Brand | Part Number | Notes |
|---|---|---|
| Hubbell Bell | 5385-0 | Same trade size and fitting type |
| Conversions Tech | 210-31021 | Stocked; same-day shipping on in-stock items |
Crosses match trade size, fitting type and listing class. Verify fit against the manufacturer data sheet for your application. Trademarks belong to their owners. Look up any competitor number on the cross-reference hub.
FAQ
Does this box meet NEC box fill requirements for 12 AWG devices?
Yes. The 18.3 in³ internal volume exceeds NEC 314.16(A) requirements for 1-gang device enclosures. For 12 AWG conductors, deduct 2.25 in³ per device yoke plus allowance for grounding conductors and cable clamps as applicable.
Is NEMA 3R/4 rating sufficient for wet locations without additional protection?
NEMA 3R provides rain-tight protection for outdoor use; NEMA 4 adds hose-directed water resistance. This rating satisfies NEC 314.15 for wet locations when properly installed with listed fittings and maintained gasket integrity. For submersion or prolonged standing water, verify local amendments requiring NEMA 4X or 6P.
What torque specifications apply for hub and device mounting?
Conduit locknuts: 35 lbf·in; box mounting lugs: 25 lbf·in; M4 ground screw: 12 lbf·in; device mounting to 6-32 bosses: 8 lbf·in. Closure plugs: 30 lbf·in. Use calibrated torque tools to prevent thread damage in aluminum castings.
Specifications
| Part Number | 210-31021 |
| Category | Tool |
| Weight | 0.5 lb |
| HS Code | 8203.20.6060 |
Why Pros Buy Direct from Conversions Tech
Quality-tested and UL Listed. Every product we carry is built to our specifications by certified manufacturing partners and quality-verified before it ships. UL/CSA listed where required, NEC compliant.
Cross-reference savings. Direct equivalents to Burndy, Hubbell, and other OEM part numbers at up to 30% less — same specs, same certifications, without the big-brand markup.
Real technical support. Need a torque spec, die reference, or an OEM quote? You’ll speak directly with the Conversions Tech engineering desk — not a script reader — for instant answers, custom kitting, and private-label options.
Fast US fulfillment. Orders in by 2PM ET ship same day from our US warehouse, nationwide ground and expedited.
