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Polished 316 stainless steel threaded conduit hub with locknut

CALBRITE

CALBRITE S64000LT00 4 in. Threaded Conduit Hub 316 SS

SKU CH-1QEH-PDF3T

Threaded 316 stainless steel conduit hub for RMC and IMC, 4.06 lb, includes locknut

  • Product typeConduit & Raceways
  • 316 stainless steel resists corrosion in harsh environments
  • NPT threaded connection fits 4 in. RMC and IMC conduit
  • Polished finish protects against moisture and chemicals
  • Insulated throat shields conductors from sharp edges
  • Includes stainless steel locknut for secure indoor or outdoor mounting

4-Inch Threaded Conduit Hub

The CALBRITE S64000LT00 is a 4 in. threaded hub constructed from 316 stainless steel for use with RMC and IMC raceways. It provides a secure connection point for threaded metallic conduit in commercial and industrial electrical installations. The fitting carries a UL listing and is rated for both indoor and outdoor environments. Electricians and maintenance crews specify it where corrosion resistance is a primary requirement.

316 Stainless Steel Build

The hub body and included locknut are made from 316 stainless steel with a polished finish that resists chemical and atmospheric corrosion. An insulated throat protects conductor insulation during wire pulling. NPT threads match standard 4 in. conduit dimensions for a tight mechanical joint. The unit weighs 4.06 lb and measures 5 1/2 in. overall length with a 4 1/2 in. width profile.

Supplied Stainless Locknut

A stainless steel locknut ships in the box so the installer can secure the hub to an enclosure without sourcing separate hardware. The locknut matches the hub material to maintain the corrosion-resistant assembly. No additional bushings, gaskets or software are included with this fitting. Buyers needing hubs for EMT, PVC or larger trade sizes must select a different model.

How it compares

Measured against everything we stock in Electrical Conduit & Fittings, at today’s prices. Recalculated every night.

Price $309.99
Pricier than about 94% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand nameCALBRITE
Product typeConduit & Raceways

Questions about this item

What does the NPT thread standard on this 4 in. hub cap in practice?

The NPT thread standard caps the connection at a 4 in. trade size for threaded metallic conduit, ensuring a secure, tapered seal with RMC or IMC fittings.

What physical clearance does the 5-1/2 in. overall length and 4-1/2 in. width require for mounting?

The hub needs enough space to accommodate its 5-1/2 in. overall length and 4-1/2 in. width, plus the included stainless steel locknut, for a flush fit on the enclosure.

How is the insulated hub installed, and what step is often missed with the locknut?

Thread the hub onto the conduit, tighten the included stainless steel locknut securely against the enclosure wall to maintain grounding continuity, and verify the insulated throat protects conductors.

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